As a Wind Hunt hypercarry, Feixiao operates on a unique resource loop: she completely bypasses standard Energy mechanics, utilizing Flying Aureus stacks generated by total team attack frequency. Because her multi-hit Ultimate (Terrasplitter) ignores elemental Weakness types to deplete Toughness directly, optimizing her build requires maxing out CRIT Rate, Speed, and DEF Ignore stacking.

Core Kit & Trace Priority

Feixiao gains 1 Flying Aureus stack for every 2 attacks performed by any ally (including follow-ups, counters, and summons). She holds up to 12 stacks, with each Ultimate cast consuming 6 stacks.

Because her Ultimate consists of up to 6 rapid strike hits, CRIT Rate consistency is paramount. A non-critical hit on any of her Ultimate sequence strikes severely hurts total damage output.

Ability Upgrade Order

1. Ultimate (Terrasplitter): Primary damage engine. Leveling increases per-hit scaling on both Boltsunder and Waraxe strike choices.
2. Talent (Thunderclap): Dictates the damage multiplier of her guaranteed out-of-turn Follow-Up Attack (FUA) and her innate CRIT DMG self-buff.
3. Skill (Waraxe): Deals Wind damage and immediately triggers a Talent Follow-Up Attack.
4. Basic Attack: Low priority; rarely used in clean Skill Point (SP) rotations.

Light Cone Rankings & Performance

Feixiao benefits heavily from Light Cones offering raw CRIT Rate, Follow-Up Attack bonuses, and DEF Ignore.

Gamer Tip on Swordplay: Feixiao’s Ultimate strikes count as individual hits against the same target, allowing S5 Swordplay to reach its full 80% damage bonus on the very first Ultimate cast.

Best Relic & Planar Ornament Sets

Relic Sets

1. 4pc The Wind-Soaring Valorous (Best-in-Slot)
   - 2pc: Increases ATK by 12%.
   - 4pc: Increases CRIT Rate by 6%. After launching a Follow-Up Attack, increases Ultimate DMG by 36% for 1 turn.

• Why it works: Perfect synergy. Feixiao’s Skill automatically triggers her Talent’s Follow-Up Attack before her turn finishes, ensuring 100% uptime on the 36% Ultimate DMG buff.

2. 4pc Pioneer Diver of Dead Waters (Debuff Comps)
   - 2pc: Increases DMG dealt to debuffed enemies by 12%.
   - 4pc: Increases CRIT Rate by 4%. Deals 8%/12% increased CRIT DMG to enemies with 2/3 debuffs.

• Why it works: Viable only if running heavy debuff engines like Topaz (E1/S1), Moze, or Aventurine (S1).

Planar Ornaments

• 2pc Duran, Dynasty of Running Wolves (Best-in-Slot): Ally follow-ups generate stacks. At 5 stacks, grants 25% FUA DMG and 25% CRIT DMG. The indisputable standard for FUA-heavy team comps.
• 2pc Izumo Gensei and Takama Divine Realm: Grants 12% ATK and an extra 12% CRIT Rate as long as another Hunt character (Topaz, March 7th Hunt, Moze) is in the party.
• 2pc Inert Salsotto: Grants 8% CRIT Rate and 15% Ultimate/FUA DMG when CRIT Rate reaches 50%+.

Main Stats & Substat Benchmarks

Energy Regeneration Rate (ERR) ropes are completely useless on Feixiao because she lacks an Energy bar. Always run an ATK% Rope.

Sub-stat Priority

$$\text{CRIT Rate\% (to 90\%+)} > \text{SPD (to 134/143)} > \text{CRIT DMG\%} > \text{ATK\%}$$

Target Stat Benchmarks (In-Battle)

- CRIT Rate: 90% – 100% (Aim for 80%+ on character stat sheet)
- CRIT DMG: 130% – 160%+
- Speed: 134+ (Standard 2-turn Cycle 0 threshold) or 143+
- ATK: 2,600 – 3,000+
- Energy Regeneration Rate: 0% (Do NOT equip ERR Ropes)

Sub-DPS Comparison: Topaz vs. March 7th (Hunt) vs. Moze

Feixiao’s ultimate frequency depends heavily on her secondary Hunt sub-DPS. Choosing between Topaz & Numby, March 7th (Hunt), and Moze shapes your team’s Skill Point (SP) economy, stack generation speed, and total damage ceiling.

1. Topaz & Numby: The Premium Gold Standard

• Stack Loop Synergy: Numby advances by 50% whenever any ally lands a Follow-Up Attack. Because Feixiao launches a guaranteed FUA on Skill, and Aventurine/Robin attack out-of-turn, Numby enters an infinite turn-advance loop that generates Flying Aureus stacks faster than any other setup.
• Buffing Value: Applies a permanent 50% FUA DMG Vulnerability to targeted enemies via Proof of Debt. At E1 or S1, Topaz adds an extra +50% CRIT DMG or +24% CRIT DMG / +12% CRIT Rate debuff, respectively.
• Verdict: Topaz is Feixiao’s undisputed best-in-slot partner for top-tier Memory of Chaos, Pure Fiction, and Apocalyptic Shadow clears.

2. March 7th (Hunt): The SP-God F2P Champion

• Stack Loop Synergy: Designate Feixiao as March’s Master (Shihan). Whenever Feixiao attacks or uses her Talent FUA, March gains 1–2 charge points. At 7 charges, March immediately triggers an enhanced multi-hit Basic Attack, which instantly procs Feixiao’s Talent FUA back in response.
• Buffing Value: Grants Feixiao +10.8% SPD passively, allowing Feixiao to drop SPD boots for ATK% boots while maintaining 134+ SPD thresholds. She also boosts Feixiao’s CRIT DMG by up to 60%.
• Verdict: March 7th costs zero Stellar Jades, uses almost zero Skill Points, and performs within 5–8% of an E0S0 Topaz. She is the best budget alternative in the game.

3. Moze: The Single-Target Assassin

• Stack Loop Synergy: Moze uses his Skill to mark a primary boss as Prey and enters the Departed state. Every time allies attack the Prey, Moze deals an additional coordinated hit. After 7 coordinated attacks, Moze launches a powerful FUA.
• Buffing Value: Increases FUA DMG taken by the Prey by 25%, and grants teamwide +40% CRIT DMG against the target at Eidolon 2 (E2).
• Limitation: When the Prey enemy dies, Moze exits Departed state and loses his buffs until his turn comes around to re-apply his Skill on a new target. This causes noticeable downtime in multi-wave or add-heavy encounters.
• Verdict: Exceptional single-target boss burster (ideal for Apocalyptic Shadow), but slightly clunkier than March 7th in multi-wave Memory of Chaos stages.

Optimal Team Compositions

1. The Premium FUA Engine (F3A)

Feixiao (DPS) | Robin (Support) | Topaz & Numby (Sub-DPS) | Aventurine (Sustain)

• Synergy: Numby and Aventurine’s counters trigger continuous out-of-turn hits, feeding Feixiao’s stack bar at maximum speed. Robin’s teamwide Action Advance and flat bonus physical DMG per hit elevate teamwide DPS output to peak levels.

2. High-Speed F2P Core (March 7th Hunt Variant)

Feixiao (DPS) | March 7th - Hunt (Sub-DPS) | Moze or Robin (Buffer) | Gallagher / Lingsha (Sustain)

• Synergy: Designate Feixiao as March 7th’s Shihan. March gains charge points every time Feixiao attacks or FUAs, triggering rapid enhanced basic attacks that loop back to generate Flying Aureus charges for Feixiao.

Practical Combat Tips

1. Stack Management: Feixiao can hold up to 12 Flying Aureus stacks. Do not sit on 12 stacks—cast her Ultimate as soon as 6 stacks accumulate during boss vulnerability phases to avoid overflowing stack waste.
2. Target Switching During Ultimate: You can manually target strikes during Terrasplitter. If a minion reaches 0 HP mid-Ultimate sequence, switch remaining hits directly to the main boss target to preserve total damage value.
3. Skill Usage: Always use Feixiao’s Skill over Basic Attack unless out of Skill Points. Her Skill guarantees an immediate Follow-Up attack, counting as 2 hits toward her own stack-building loop.

When optimizing Feixiao, choosing between Robin and Sparkle comes down to understanding how Feixiao generates her Flying Aureus stacks. Because Feixiao relies on total team attack frequency rather than energy, Robin is Feixiao’s undisputed Best-in-Slot Harmony support, outperforming Sparkle by approximately 18% to 25% in total team damage output.

Here is a detailed breakdown of how Robin and Sparkle compare across stack generation, action advance mechanics, damage amplification, and Skill Point (SP) economy.

Metric Comparison: Robin vs. Sparkle

1. Stack Generation Rates: The Flying Aureus Engine

Feixiao gains 1 Flying Aureus stack for every 2 ally attacks. Because sub-DPS units (Topaz, March 7th Hunt, Moze) and sustains (Aventurine, Lingsha) attack frequently, team attack density dictates Feixiao’s Ultimate frequency.

• Robin’s Stack Generation (S-Tier):When Robin casts her Ultimate (Pinion’s Aria), all three teammates immediately get a 100% Action Advance. In a standard FUA team (Feixiao + Topaz + Aventurine + Robin):
  1. Topaz acts $\rightarrow$ triggers Numby Follow-Up Attack (FUA).
  2. Feixiao acts $\rightarrow$ triggers Talent FUA.
  3. Aventurine acts $\rightarrow$ builds Blind Bet stacks for a bounce FUA.
  This single Robin Ultimate sequence results in 6 to 8 team attacks in rapid succession, instantly generating 3 to 4 Flying Aureus stacks within a single cycle. Furthermore, every ally hit during Robin’s Concerto state triggers Robin’s personal Physical Additional DMG.
• Sparkle’s Stack Generation (B-Tier):Sparkle’s Skill advances only Feixiao by 50%. While this allows a 0-SPD Feixiao to act as frequently as a 160-SPD unit, it leaves the sub-DPS and sustain moving at their normal speeds.
  A turn where Sparkle advances Feixiao yields exactly 2 attacks (Feixiao’s Skill + her Talent FUA), granting 1 Flying Aureus stack. Sparkle provides zero attack acceleration for the rest of the team.

2. Action Advance Mechanics: Burst vs. Single-Target

• Robin (Teamwide 100% Action Advance):Robin’s Ultimate resets the entire turn queue. During Concerto, Robin cannot act, making her completely SP-positive while active. Because Feixiao’s team attacks constantly (via counters, follow-ups, and basic attacks), Robin regenerates Ultimate Energy at an accelerated pace, allowing her to maintain high uptime on her teamwide advance.
• Sparkle (Single-Target 50% Action Advance):Sparkle operates as a continuous engine. By building Sparkle to 160+ SPD (Hyperspeed), she pulls a 0-SPD Feixiao (wearing ATK% boots) forward constantly. This maximizes Feixiao’s individual turn frequency, but misses out on the burst-stack generation created when the entire party acts simultaneously.

3. Damage Amplification: Dual-DPS vs. Single Hypercarry

Feixiao’s highest-performing compositions are inherently Dual-DPS setups (pairing Feixiao with Topaz, March 7th Hunt, or Moze).

• Why Robin Dominates Dual-DPS Comps:Robin’s buffs—teamwide ATK%, teamwide DMG%, teamwide CRIT DMG%, and her passive +25% CRIT DMG for Follow-Up Attacks—apply to every character on the field. Both Feixiao and her sub-DPS partner receive 100% of Robin’s buff value. Additionally, Robin’s flat additional physical damage triggers on every single hit from Numby, March’s enhanced basic attacks, and Aventurine’s coin bounces.
• Where Sparkle Falls Short:Sparkle’s primary buff—her massive single-target CRIT DMG boost—only applies to the specific target of her Skill (Feixiao). Her sub-DPS partner receives no CRIT DMG boost and only minimal teamwide DMG% from Sparkle’s talent. This leaves 30%–40% of the team’s total damage potential unbuffed.

4. Skill Point (SP) Economy

• Sparkle: Unmatched SP generation (+4 SP per Ultimate, +7 max SP cap). If running an extremely SP-hungry sub-DPS or sustain setup, Sparkle ensures you never run out of points. However, Feixiao teams are naturally SP-light (March 7th and Topaz are SP-positive, Aventurine/Gallagher rarely use Skills), making Sparkle’s excess SP somewhat redundant.
• Robin: Highly SP-positive once Concerto is active, but requires careful SP management during her opening setup turn. Paired with SP-positive partners like March 7th (Hunt), Topaz, or Gallagher, Robin has zero issues maintaining clean Skill rotations.

Final Verdict

• Pull / Run Robin if: You want Feixiao’s absolute highest damage ceiling, fastest stack generation, and seamless synergy with Topaz, March 7th (Hunt), Moze, and Aventurine.
• Run Sparkle if: Robin is locked to another team in Memory of Chaos / Apocalyptic Shadow, or if you are running a hypercarry setup without a secondary Hunt sub-DPS.

To maximize Robin’s synergy with Feixiao, your primary objective is achieving 100% Concerto Ultimate uptime. While Feixiao’s high-frequency Follow-Up Attack (FUA) engine continuously funnels flat energy to Robin, meeting exact Energy Regeneration Rate (ERR) thresholds and equipping the correct ATK-scaling relics ensures Robin never experiences awkward downtime turns.

Energy Regeneration Rate (ERR) Thresholds & Mechanics

Robin’s Ultimate (Vox Harmonique, Opus Cosmique) costs 160 Energy—the highest cost in Honkai: Star Rail.

However, Robin’s Talent (Tonal Resonance) regenerates 2 flat Energy every time an ally attacks. In a Feixiao team (Feixiao + Topaz/March 7th + Aventurine/Lingsha), the party lands roughly 30 to 45 individual attacks per cycle. This translates to 60–90 free Energy regenerated purely from team attack frequency.

Base Energy Cost: 160
Feixiao Team Flat Energy Generation: ~60–90 Energy per Concerto rotation
Skill Energy Generation: 35 Energy (with A6 Trace "Sequential Passage")

ERR Threshold Benchmarks

The ATK% Rope Trap: Do not equip an ATK% Rope on Robin, even in a Feixiao team. Sacrificing 19.4% ERR for an ATK% Rope leaves Robin short by 15–25 Energy when Concerto ends, forcing her to take 2 full manual turns (using SP) to re-cast her Ultimate.

Light Cone Rankings for Supporting Feixiao

When supporting Feixiao, Robin’s Light Cone must balance Energy Regeneration, Base ATK (which dictates the ATK transferred to Feixiao), and Team Damage Buffs.

Best Relics & Planar Ornaments

Robin does not benefit from 4-piece set effects because she remains in the Concerto state (unable to take actions) for the majority of combat. Instead, stack 2pc / 2pc ATK sets to maximize the raw ATK transferred to Feixiao and increase Robin’s personal Physical Additional DMG procs (120% ATK per hit).

Relic Sets

2pc Musketeer of Wild Wheat (+12% ATK) 
+ 
2pc Prisoner in Deep Confinement / 2pc Wind-Soaring Valorous (+12% ATK)

• Why this works: Grants a passive +24% ATK out-of-battle, boosting Feixiao’s raw damage output during Concerto without requiring active triggers.

Planar Ornaments

• 2pc Lushaka, the Sunken Seas (Best-in-Slot for Feixiao):Grants +5% ERR. If Robin is not placed in Slot 1 of the team, it passively increases the ATK of the Slot 1 character (Feixiao) by 12%. This set provides both the required energy threshold and direct hypercarry amplification.
• 2pc Sprightly Vonwacq (Alternative):Grants +5% ERR and advances Robin’s action by 40% at the start of battle. This guarantees Robin acts before Feixiao and Topaz on Cycle 0, allowing her to cast her Skill and accumulate Energy before the rest of the team starts attacking.
• 2pc Fleet of the Ageless / Broken Keel:Provides teamwide +8% ATK or +10% CRIT DMG, but lacks the 5% ERR bonus. Only run these if you already hold her Signature Light Cone (Flowing Nightglow).

Target Stat Benchmarks

Robin’s additional damage during Concerto has a fixed 100% CRIT Rate and 150% CRIT DMG. Therefore, CRIT Rate and CRIT DMG sub-stats on Robin are completely useless.

Optimal End-Game Stats

• ATK: 4,000+ (Out-of-battle)
• Energy Regeneration Rate: 124.4% minimum (139.4% with Signature)
• Speed: 120 (Reaches Vonwacq / Lushaka bonus thresholds)
• HP / DEF: 3,500+ HP / 1,000+ DEF (To prevent getting burst down in high MoC/Apocalyptic Shadow stages)

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