Sunday isn’t just another Harmony buffer you slot in and forget. He’s a tempo controller who turns clean rotations into brutal snowballs, and when he’s built correctly, he makes entire Memory of Chaos cycles feel one turn shorter. That’s why his Light Cone choice matters more than it looks on paper.
Sunday’s Actual Job in a Team
Sunday’s value comes from forcing the turn order to behave. His kit is built around accelerating allies, extending buff uptime, and smoothing rotations so your DPS never wastes a turn or overcaps energy. In high-end content, that control is often worth more than raw ATK buffs.
Unlike older Harmony units that just stack numbers, Sunday rewards precision. If your DPS acts at the wrong time, you lose damage. If they act at the perfect time, you gain an entire extra skill cycle over the fight. His Light Cone directly affects how consistently that happens.
How Sunday Scales and Why Stats Matter
Sunday’s buffs primarily scale off his own stats, but not in the way Bronya or Tingyun do. He cares far more about Energy Regeneration Rate and turn frequency than raw ATK or HP. More ult uptime means more turn manipulation, which is the core of his kit.
Speed is the other silent multiplier. The faster Sunday is, the more often he can reposition your DPS in the action order. A Light Cone that enables smoother energy flow or extra skill point economy often outperforms one with slightly higher base stats.
What Sunday Actually Wants From a Light Cone
At a baseline, Sunday wants three things: Energy Regeneration, team-wide utility, and consistency. Anything that helps him ult faster or provides buffs without extra skill point cost is immediately valuable. Personal damage bonuses are almost irrelevant unless they’re stapled to utility.
Premium Light Cones shine by compressing multiple effects into one slot, usually combining ERR with powerful team buffs. Meanwhile, strong F2P options tend to focus on one key function, like faster energy or bonus effects after using skills. Knowing which of those matters most for your account is the difference between an optimal pick and a wasted upgrade.
In short, Sunday doesn’t need a flashy cone. He needs one that respects his role as the team’s conductor, not a background buffer. The best Light Cones amplify his control over the fight, not his personal numbers, and that philosophy is what separates top-tier builds from mediocre ones.
How We Rank Sunday’s Best Light Cones (Buff Value, Uptime, Team Synergy, and Mode Performance)
With Sunday, Light Cone rankings are less about raw stats and more about how reliably they let him do his job. A cone that looks weaker on paper can easily outperform a premium option if it enables better turn control, smoother energy flow, or cleaner rotations. That’s why our ranking system prioritizes performance in real endgame scenarios, not just theoretical buff ceilings.
To keep this practical, every Light Cone is evaluated across four core criteria that directly impact Sunday’s value in Memory of Chaos, Pure Fiction, and long-form boss fights.
Buff Value: What the Light Cone Actually Gives the Team
First and foremost, we look at how much meaningful power a Light Cone adds to the team, not to Sunday himself. Team-wide buffs, turn manipulation bonuses, and effects that indirectly increase DPS uptime are weighted far higher than personal damage or survivability.
Sunday’s kit already provides strong action control, so the best Light Cones either amplify that control or stack additional utility on top of it. If a cone only boosts Sunday’s own stats without improving team output, it immediately drops in the rankings.
Uptime and Consistency: Can the Buffs Be Trusted Every Cycle?
A massive buff means nothing if it’s locked behind awkward conditions or long cooldowns. We heavily prioritize Light Cones that maintain near-constant uptime, especially ones that sync naturally with Sunday’s skill and ultimate cadence.
Energy Regeneration Rate plays a huge role here. Cones that allow Sunday to ult one turn earlier, or avoid energy starvation in longer fights, often outperform higher-rarity alternatives with stricter triggers. Consistency beats bursty power every time in endgame content.
Team Synergy: How Well It Plays With Modern DPS and Supports
Sunday doesn’t exist in a vacuum, and neither do his Light Cones. We evaluate how each option interacts with common team cores, including hypercarry comps, dual-DPS setups, and SP-hungry teams that rely on tight rotations.
Light Cones that ease skill point pressure, enhance turn order manipulation, or complement popular DPS units rise sharply in value. A cone that feels average in isolation can become top-tier when paired with the right carry and support lineup.
Mode Performance: Memory of Chaos vs. Pure Fiction
Not all endgame modes reward the same strengths, and Sunday’s Light Cone preferences shift depending on where you’re playing. Memory of Chaos favors precise turn control, energy stability, and boss-focused uptime, while Pure Fiction rewards faster cycling and broad team efficiency.
Our rankings reflect that split. Some Light Cones excel in MoC but fall off in Pure Fiction, while others shine specifically in wave-based content. We account for both, noting which cones are all-rounders and which are mode specialists.
Premium vs. Accessible Options: Value for Your Account
Finally, we factor in opportunity cost. A signature or limited 5-star Light Cone needs to offer a noticeable upgrade over strong 4-star alternatives to justify the investment. If a free or easily obtainable option delivers 80–90 percent of the performance, that matters for F2P and light spenders.
This approach ensures our rankings aren’t whale-centric. Whether you’re optimizing with battle pass cones, event rewards, or chasing best-in-slot, each recommendation is grounded in realistic account progression and actual endgame impact.
Together, these criteria form the backbone of our Light Cone rankings for Sunday. Every option you’ll see ranked high succeeds in at least two of these areas, and the very best excel in all four, turning Sunday from a good Harmony unit into a true endgame conductor.
S-Tier Light Cones: Best-in-Slot Options for Endgame Sunday Builds
At the top of the ladder, S-tier Light Cones are the ones that push Sunday from “excellent support” into a true endgame engine. These picks amplify his core strengths: turn manipulation, buff uptime, and team-wide efficiency under tight rotations. If you’re pushing high-cycle clears in Memory of Chaos or chasing score thresholds in Pure Fiction, this is where optimal builds begin.
His Signature Light Cone: The Definitive Best-in-Slot
Sunday’s signature Light Cone is, unsurprisingly, his strongest option across all modes. It directly scales with how he wants to play: frequent skill usage, consistent Ultimate uptime, and maximizing the value of every turn he grants or accelerates. The cone’s buffs line up perfectly with Sunday’s rotation, meaning there’s minimal downtime and no awkward desync with modern DPS kits.
What truly pushes it into S-tier is how it smooths out team flow. Skill point pressure drops, DPS units get their power windows exactly when they need them, and energy generation feels stable even in longer MoC boss fights. For light spenders or anyone already pulling for Sunday, this Light Cone is the cleanest and most future-proof investment.
But the Battle Isn’t Over: Why This Cone Dominates Both MoC and Pure Fiction
In Memory of Chaos, the signature cone excels by reinforcing turn order control and buff consistency. Boss fights reward precision, and this Light Cone ensures Sunday never falls out of sync with hypercarry cooldowns or Ultimate timings. The result is smoother clears with fewer reset-worthy RNG moments.
Pure Fiction tells a similar story, just faster. The added efficiency lets Sunday cycle buffs quickly across waves, keeping AoE DPS units online without stalling between enemy spawns. While Pure Fiction values speed over precision, this cone delivers both, which is rare even among premium options.
Alternative S-Tier: Premium Harmony Cone With Universal Value
If Sunday’s signature isn’t available, the top-tier generic 5-star Harmony Light Cone sits just a step below and still earns S-tier placement. Its strength lies in raw stat efficiency and universally powerful buffs that don’t rely on niche conditions. Sunday leverages these bonuses better than most Harmony units thanks to his natural uptime and turn manipulation.
This option shines in accounts that rotate supports between teams. While it doesn’t feel as tailor-made as the signature cone, it performs consistently in both MoC and Pure Fiction and scales well with future DPS releases. For players who want flexibility without sacrificing endgame power, this is the safest premium alternative.
When to Choose Signature Over Universal, and Vice Versa
The choice between these two S-tier options comes down to commitment. If Sunday is a permanent fixture in your roster and your account revolves around hypercarry optimization, his signature Light Cone is unmatched. It extracts every ounce of value from his kit and rewards precise play.
If you value adaptability or already own a top-tier Harmony cone, the universal option remains a powerhouse. You’ll give up a small amount of peak performance, but gain roster flexibility and still dominate endgame content. Either way, these S-tier Light Cones define what optimized Sunday builds look like at the highest level.
A-Tier Light Cones: High-Value Alternatives for Light Spenders and Optimized F2P
After the premium discussion, this is where most optimized accounts will realistically land. A-tier Light Cones don’t replicate the ceiling of S-tier options, but they come surprisingly close when paired with clean rotations and smart team-building. For many players, these are the cones that carry Sunday through full Memory of Chaos clears without feeling like a compromise.
Past and Future
Past and Future is one of the most direct budget-friendly synergies with Sunday’s kit. Its damage buff activates when he uses his Skill on an ally, which lines up perfectly with his core gameplay loop of targeted buffing and turn manipulation. There’s no gimmick here, just reliable DPS amplification that’s easy to maintain.
This cone excels in hypercarry teams where Sunday is glued to one main DPS for the entire fight. In MoC, the consistent uptime translates into predictable damage windows, while in Pure Fiction it helps stabilize wave-to-wave output. If you want a no-nonsense option that rewards clean execution, this is the gold standard for optimized F2P.
Dance! Dance! Dance!
Dance! Dance! Dance! trades raw damage buffs for tempo control, and Sunday makes excellent use of it. Advancing ally actions after his Ultimate stacks naturally with his own turn manipulation, letting teams squeeze in extra DPS turns before enemies can respond. This is especially valuable in speed-sensitive content.
Pure Fiction is where this cone truly shines, as faster rotations mean quicker wave clears and higher scores. In MoC, it’s slightly more situational, but still powerful in teams that rely on strict Ultimate timing. Choose this if your roster already has strong damage numbers and just needs to go faster.
Memories of the Past
Memories of the Past focuses on Energy Regeneration and Break Effect, which might look understated at first glance. For Sunday, the Energy Regen is the real prize, enabling faster Ultimate cycles and more frequent buff refreshes. More Ultimates means more turn control, which indirectly boosts team damage.
This cone is best used when your build is just short of key Energy thresholds or when running longer MoC fights where consistency matters more than burst. It won’t inflate DPS numbers on paper, but it smooths rotations and reduces downtime. For players who hate resets caused by awkward energy gaps, this is a quiet MVP.
Carve the Moon, Weave the Clouds
Carve the Moon, Weave the Clouds is the most RNG-heavy option in this tier, but the payoff can be strong. Its rotating buffs can grant ATK, Crit DMG, or Energy Regen, all of which Sunday can leverage effectively. While you can’t control the roll, none of the outcomes are wasted on his kit.
This cone is best for accounts that value flexibility and don’t mind a bit of variance. Over long fights or repeated Pure Fiction runs, the average value remains solid, even if individual turns feel swingy. Light spenders who picked this up from the Battle Pass will find it a perfectly viable endgame option.
Planetary Rendezvous
Planetary Rendezvous becomes an A-tier pick when Sunday is paired with a DPS that shares his Element. In those setups, the damage bonus is unconditional and extremely efficient, rivaling higher-rarity options in focused team comps. It’s narrow, but very potent when it hits.
This cone is ideal for players running elemental mono or semi-mono teams in MoC. Outside of those comps, its value drops sharply, so it’s not a universal recommendation. If your roster supports it, though, this is one of the highest-impact low-investment choices available.
Budget & F2P Light Cones: What Still Works and Why
Not everyone is chasing signature Light Cones, and Sunday doesn’t actually demand them to function at a high level. His kit scales more off clean rotations, Ultimate uptime, and buff consistency than raw stats. That makes him surprisingly forgiving for F2P players who understand what their Light Cone is doing and why it works.
Meshing Cogs
Meshing Cogs remains the gold standard for true F2P Harmony setups, and Sunday is no exception. The flat Energy Regen on hit dramatically shortens his Ultimate cycle, especially in multi-target content where he can reliably trigger the effect. Faster Ultimates mean tighter buff loops, which is the core of Sunday’s value.
This cone shines in Memory of Chaos stages with frequent enemy actions or summons. It won’t boost team damage directly, but the tempo gain is real and measurable. If your Sunday ever feels one turn late, Meshing Cogs is usually the fix.
Chorus
Chorus is simple, consistent, and criminally underrated. The teamwide ATK buff on battle start gives your DPS immediate momentum, which is especially relevant in MoC wave-based clears. Sunday appreciates front-loaded value since it lets him stabilize rotations faster.
This cone is best for players who prioritize consistency over optimization tricks. It’s not flashy, but it performs exactly the same every run, which matters when you’re pushing turn limits. For newer accounts or low-investment Sundays, Chorus is an easy recommendation.
Past and Future
Past and Future offers targeted damage amplification, which pairs well with Sunday’s turn manipulation. When played correctly, the DPS receiving his buffed turn also benefits from the cone’s bonus, creating a clean damage spike without extra setup. It rewards players who understand turn order rather than raw stats.
This is a strong choice in single-carry teams where one DPS does most of the heavy lifting. It’s less effective in dual-DPS or chaotic speed setups, but in structured comps, the value is undeniable. If you enjoy precise play, this cone punches above its rarity.
Dreamville Adventure
Dreamville Adventure is a niche but functional option for players deep into Pure Fiction. The increased damage against debuffed enemies synergizes with teams that already apply constant debuffs or Weakness Break effects. Sunday doesn’t apply debuffs himself, but he enables the teammates who do.
This cone works best in score-focused modes where enemy waves melt quickly. It’s not recommended for MoC boss stages, where its uptime drops sharply. Use it when your team already meets the condition naturally and you want to squeeze out extra points.
When to Stick Budget vs Upgrade
If your Sunday is hitting his Ultimate on cooldown and your DPS rotations feel clean, budget Light Cones are doing their job. The moment you notice energy desyncs, buff downtime, or inconsistent clears, that’s when premium options start pulling ahead. Until then, smart F2P choices can comfortably clear endgame content.
For most players, Meshing Cogs or Past and Future will cover nearly every scenario. Light spenders can selectively upgrade, but there’s no rush. Sunday’s strength comes from execution first, gear second.
Mode-Specific Recommendations: Memory of Chaos vs Pure Fiction vs General Use
Not all endgame modes value the same things, and Sunday feels very different depending on what you’re pushing. Turn limits, wave structure, and scoring systems directly affect which Light Cones pull ahead. If you want consistent clears instead of theoretical DPS, your cone choice should always reflect the mode.
Memory of Chaos: Turn Economy Above All Else
Memory of Chaos is where Sunday’s turn manipulation truly shines, but only if his Ultimate timing is airtight. Energy regeneration and predictable rotations matter more here than raw buffs, because missing a single Ultimate can cost an entire cycle. This is why Meshing Cogs remains one of the most reliable options for MoC, especially for F2P and low-Eidolon setups.
Past and Future is the go-to upgrade when your speed tuning is already locked in. In MoC’s single-target boss floors, the ability to funnel damage into one buffed DPS turn creates clean, repeatable breakpoints. It’s best used in teams where Sunday always acts immediately before the main carry, minimizing RNG and maximizing burst windows.
Premium cones only pull ahead in MoC if they improve consistency, not just peak damage. If your clears already hinge on perfect turn order, Past and Future or higher-rarity options become worthwhile. If you’re still stabilizing rotations, budget cones will actually perform better over multiple runs.
Pure Fiction: Buff Coverage and Wave Flow
Pure Fiction flips the script by rewarding uptime and wave control rather than perfect sequencing. Sunday’s value here comes from maintaining buffs across constant enemy spawns, not from single massive turns. Light Cones that provide passive, always-on bonuses tend to outperform ones that require strict timing.
Dreamville Adventure gains real value in this mode, provided your team applies debuffs naturally through AoE attacks or frequent Weakness Breaks. The cone doesn’t make Sunday stronger on his own, but it amplifies what the team is already doing. In score-based modes, that indirect scaling matters more than clean rotations.
Meshing Cogs is still perfectly viable in Pure Fiction, especially for players who want consistent Ultimate uptime without thinking about wave order. However, its advantage narrows as enemy density increases. If your team already has strong energy generation, shifting toward damage-amplifying cones will push higher scores.
General Use and Blind Pick Recommendations
For players who don’t want to swap Light Cones between modes, consistency should be the priority. Meshing Cogs is the safest blind pick across all content, offering stable energy flow regardless of team composition or encounter structure. It’s the definition of low-maintenance power.
Past and Future becomes the best general-use option once you’re comfortable managing speed and turn order. It rewards intentional play and scales well as your account improves, making it ideal for players transitioning from F2P optimization into light spending. The cone doesn’t carry mistakes, but it massively rewards clean execution.
If you primarily farm or push Pure Fiction and only occasionally dip into MoC, Dreamville Adventure is a valid specialization pick. Just understand its limits and don’t expect it to perform miracles in boss-focused content. The best Light Cone for Sunday is always the one that fits how you actually play, not just what looks strongest on paper.
Light Cone Synergy With Sunday Team Archetypes (Hypercarry, Dual DPS, and Energy-Focused Comps)
With general picks covered, the real optimization starts when you tailor Sunday’s Light Cone to the team archetype you’re actually running. His kit is flexible enough to slot into multiple compositions, but each one asks for a different kind of value. Picking the right Light Cone here is the difference between a smooth clear and a rotation that constantly feels one step off.
Hypercarry Teams: One DPS, Perfectly Fed
In classic hypercarry comps, Sunday exists to push a single DPS into absurd damage windows. These teams live and die by turn order, buff uptime, and Ultimate alignment. Past and Future is the standout here, directly amplifying the damage of the ally who acts after Sunday, which is exactly how these teams are structured.
This cone shines with characters like Jingliu, Dan Heng • Imbibitor Lunae, or Seele, where every empowered turn matters. The damage bonus is predictable, repeatable, and scales harder the cleaner your speed tuning is. For players comfortable speed-tuning Sunday to always act right before their carry, this is his highest-impact option outside of limited cones.
For F2P or newer accounts, Meshing Cogs remains a strong alternative. While it doesn’t boost damage directly, the increased Ultimate frequency lets Sunday maintain buffs and action manipulation without downtime. In hypercarry setups, consistency often beats raw numbers if it prevents desynced rotations.
Dual DPS Teams: Shared Buff Value Over Burst
Dual DPS compositions change the math entirely. Instead of funneling everything into one unit, Sunday needs to provide value that benefits multiple damage dealers across a longer window. Light Cones with conditional or single-target amplification lose efficiency here.
Dreamville Adventure becomes far more attractive in this setup, especially in content like Pure Fiction or AoE-heavy Memory of Chaos floors. If both DPS units apply debuffs or frequently break enemies, the passive damage amplification stacks up quickly. Sunday doesn’t need to micromanage who acts next; the team naturally cashes in on the cone’s effect.
Past and Future is still usable in dual DPS teams, but it becomes more demanding. You’ll need precise speed tuning to ensure the correct DPS receives the buff at the right time. If that level of control feels restrictive, Dreamville Adventure offers smoother, lower-maintenance value.
Energy-Focused Comps: Ultimates on Cooldown
Some teams are built around Ultimate spam rather than raw turn damage. Whether it’s enabling frequent team-wide buffs or feeding energy-hungry DPS units, these comps want Sunday’s Ultimate online as often as possible. Meshing Cogs is the clear MVP here.
The flat energy gain synergizes perfectly with Sunday’s role as an enabler, letting him cycle Ultimates without relying on RNG or external batteries. This is especially strong in longer fights where consistent buff uptime outweighs peak damage windows. For F2P players, this cone punches far above its rarity.
Premium options can outperform Meshing Cogs if your team already generates excess energy, but that’s a narrow use case. If Sunday is your primary engine for energy flow, Meshing Cogs remains the most reliable and cost-effective solution. In energy-focused comps, reliability is the real damage multiplier.
Final Recommendations: Which Light Cone You Should Use Based on Your Account
At this point, the right Light Cone for Sunday isn’t about raw tier lists. It’s about how much control you have over your rotations, how tight your speed tuning is, and whether your account leans toward burst clears or long-form consistency. With that in mind, here’s how to lock in the best choice based on your roster and goals.
If You’re a F2P or Low-Spend Optimizer
Meshing Cogs should be your default starting point, and honestly, it’s good enough to clear endgame content when built properly. The flat Energy gain smooths out Sunday’s Ultimate cycles, which directly translates to more buffs and fewer dead turns. In Memory of Chaos, that consistency often matters more than chasing higher ceiling numbers.
Past and Future is your upgrade path once your speed tuning is under control. If you can guarantee that Sunday always advances the correct DPS, the damage boost is noticeable and reliable. Just be aware that poor speed alignment can completely waste the cone’s value, turning a strong option into a frustrating one.
If You’re Running Dual DPS or AoE-Centric Teams
Dreamville Adventure is the safest and most flexible pick here. It doesn’t care which unit acts next or whether Sunday is perfectly synced with the team’s turn order. As long as enemies are being hit, broken, or debuffed, the value keeps flowing naturally.
This makes it especially strong in Pure Fiction and multi-wave MoC floors, where rigid rotations tend to fall apart. If your account favors flexible team building over strict hypercarry funnels, Dreamville Adventure offers the highest return with the least micromanagement.
If You’re Playing Hypercarry With Tight Rotations
Past and Future shines the brightest in this environment. When Sunday is built faster than your DPS and consistently advances them, the cone’s buff effectively becomes a mini Ultimate layered on top of your main damage window. This is where speed tuning and action order mastery pay off.
That said, this setup demands precision. Any desync, crowd control, or turn-order disruption can cost you a full cycle of value. If you enjoy high-risk, high-reward optimization, Past and Future rewards that effort more than any other accessible option.
If You’re a Light Spender or Premium Chaser
Premium Harmony Light Cones can outperform F2P options, but only if your team already has energy and rotation stability solved. These cones tend to amplify what’s already working rather than fixing weaknesses. If Sunday isn’t already Ulting on cooldown, premium cones won’t magically solve that problem.
For accounts with well-built DPS, tuned speed breakpoints, and external energy support, premium cones offer the highest damage ceilings. Just remember that they’re win-more tools, not foundational pieces. Build your engine first, then upgrade the exhaust.
The One-Size-Fits-Most Verdict
If you want a single recommendation that works across most accounts, Meshing Cogs remains the most universally reliable choice. It’s cheap, consistent, and synergizes perfectly with Sunday’s core job: enabling the team to play the game faster and more often. From there, your upgrades should reflect how much control you have over your rotations, not just how shiny the cone is.
Sunday rewards players who think ahead, plan their turn order, and value uptime over flashy peaks. Pick the Light Cone that complements how you actually play, not how a spreadsheet says you should. In Honkai: Star Rail’s endgame, clean execution always beats theoretical damage.