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Genshin Impact Iansan Guide: Best 4-Star Pyro Support Build & Team Comps

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Genshin Impact Iansan Guide: Best 4-Star Pyro Support Build & Team Comps

Introduction

Iansan is a highly versatile 4-star Pyro character in Genshin Impact, offering strong support capabilities that rival even top-tier units. Her unique kit enables her to boost team performance through reliable attack buffs, healing, and consistent energy generation. Whether you're building around her as a main support or pairing her with other synergistic units, Iansan fits into various team archetypes with ease.

This guide breaks down the optimal Iansan Pyro build, recommended artifacts, weapons, and her best team compositions. From understanding her skill mechanics to maximizing her synergy with both 4-star and 5-star characters, this is the definitive 4-star Iansan guide tailored for competitive team setups and long-term progression.




Understanding Iansan’s Kit and Playstyle

Elemental Skill: Night Soul Dash & Stomp Mechanic

Iansan’s Elemental Skill initiates a quick dash through enemies, generating Night Soul Points, a resource tied to her unique stamina-like bar known as Nlin Energy. Within a 5-second window after activation, a follow-up tap of the Normal Attack button allows Iansan to stomp the ground. This action:

  • Boosts her own ATK by 20%

  • Enhances Night Soul Point regeneration from her Elemental Burst

  • Strengthens scaling if the active unit also consumes Night Soul Points

This sequence — Skill → Normal Attack → Burst — forms the foundation of Iansan’s rotation at C0.

Elemental Burst: Amplified AOE Stomp and Buff Distribution

Iansan’s Burst unleashes a large-area stomp that:

  • Restores 15 Night Soul Points

  • Applies a team-wide ATK buff

  • Scales with her total ATK — but only if her Night Soul bar is at least 80% full (42+ points)

If her Night Soul level is below this threshold, the effectiveness of the ATK buff diminishes proportionally. Her Night Soul Points deplete at a rate of 6 points per second, but characters moving, dashing, or jumping will regenerate points at a ratio of 2/3 per meter traveled.



Effective Use Case

Characters that naturally perform frequent movements, such as plunge attackers or units with active dodging patterns, enable Iansan to maintain higher uptime on her burst buff. Thus, movement-based rotations are optimal for maximizing Iansan’s value.

Talent Priority: What to Level First

To ensure Iansan performs effectively in support roles, focus on the following talent priorities:

  • Elemental Burst (Highest Priority): Boosts the ATK buff ceiling and burst utility.

  • Elemental Skill: Optional to level for better self-buff and synergy with her stomp.

  • Normal Attack: Can be left at level 1 if Iansan is not used on-field for damage.

Optimal Artifact Sets and Stat Priorities for Iansan

Best Artifact Sets

To enhance Iansan’s support potential, prioritize sets that either increase her buffing strength or provide party-wide bonuses. Two major sets stand out:

  • Fouret Scroll of the Hero of Cinder City (4-Piece)

    • Grants a 40% DMG Bonus to Nlin characters.

    • Synergizes perfectly with Iansan’s role as a Nlin support, offering both utility and amplification.

    • Recommended as the default for most players due to its team-wide value.

  • Noblesse Oblige (4-Piece) (Alternative)

    • Provides a 20% Elemental Burst DMG bonus and a 20% ATK increase for the entire team after using a Burst.

    • Use this set if another team member is already equipped with the Fouret Scroll set (as these bonuses do not stack).

Note: Due to high farming costs, it’s acceptable to keep Iansan on the Fouret Scroll set, even if it overlaps with another character.

Main Stat Recommendations

SlotRecommended Stat
SandsATK% or Energy Recharge%
GobletATK%
CircletATK% or Crit Rate% (if using Favonius Lance)

  • Use Energy Recharge on Sands if your team struggles with particle generation.

  • Use Crit Rate Circlet to meet Favonius Lance's trigger requirements.

Substat Priority

  • ATK%

  • Flat ATK

  • Energy Recharge

  • Crit Rate (if Favonius Lance is equipped)

Best Weapons for Iansan: From Free-to-Play to Premium Options



Top Recommended Polearms

Iansan's weapon selection focuses on enhancing her ATK and ensuring sufficient Energy Recharge to maintain her Burst uptime. Here's a breakdown of her best choices:

1. Favonius Lance (4-Star, F2P Friendly)

  • Base ATK: 565

  • Substat: 30.6% Energy Recharge

  • Effect: Generates energy particles on crit hits.

  • Why It’s Good: Ensures excellent energy generation for both Iansan and the team.

  • Best Use Case: When running low ER teams or helping battery other characters.

2. Tateno Ohanashi (4-Star, Event Weapon – Patch 5.4)

  • Base ATK: 565

  • Substat: 30.6% Energy Recharge

  • Effect: Grants 40% ATK Buff with uptime that supports Iansan’s buff scaling.

  • Why It’s Good: Excellent synergy with Iansan’s decaying ATK buff; highly efficient.

3. Prospector’s Drill (4-Star)

  • Substat: ATK%

  • Effect: Strong ATK scaling and passive designed for support builds.

  • Why It’s Good: Helps smooth out her buff drop-off below 42 Night Soul Points.

4. Engulfing Lightning (5-Star)

  • Substat: Energy Recharge

  • Effect: Converts ER into bonus ATK.

  • Why It’s Good: Maximizes both buff potential and Burst uptime. Top-tier option.

5. Vortex Vanquisher / Calamity Queller / Skyward Spine (5-Star Options)

  • Why They Work: High base ATK, decent secondaries, and strong synergy with Iansan’s stat scaling needs.

  • Use If: You’re building her as a strong buffer with access to 5-star polearms.

Weapon Summary

Weapon NameBest For
Favonius LanceEnergy utility, team recharge support
Tateno OhanashiBoosting ATK buff, F2P burst optimization
Prospector’s DrillMaintaining buff after decay starts
Engulfing LightningHigh-end energy/ATK scaling synergy
Vortex VanquisherMaximizing ATK with shield uptime

Best Team Compositions with Iansan

Iansan’s flexibility allows her to function as a replacement for Bennett or as a complementary unit depending on team needs. Her scaling works best with characters who move frequently during combat, allowing her Night Soul Points to regenerate and her ATK buff to remain active longer.

1. Movement-Synergy Teams (Plunge or Dash Mechanics)

These characters maximize Iansan’s buff uptime due to their high mobility:

  • Gaming (4-Star Pyro)

    • Frequent plunges and dashes fit Iansan’s kit perfectly.

    • Team Example: Iansan + Gaming + Chevreuse + Electro Off-Field (Fischl/Yae Miko)

    • Swap Chevreuse for Bennett to raise the damage ceiling.

  • Verisa (5-Star Plunge DPS)

    • High synergy due to Electro resonance and plunge mechanics.

    • Team Example: Iansan + Verisa + Shenhe/Faruzan + Pyro Off-Field (Xiangling/Mavka)

  • Mavka (Bike Movement)

    • Mavka’s motion-heavy style regenerates more than the 6 Night Soul Points/sec Iansan loses.

    • Best when paired with Bennett and SE Lali for high-end teams.

2. Double Buffer Teams (Iansan + Bennett)

In teams where high ATK scaling is prioritized, Iansan and Bennett can be run together:

  • Best Use Case: When the main DPS benefits from attack buff stacking more than elemental shred.

  • Team Example: Iansan + Bennett + Gaming + Rosaria

    • Arguably one of the strongest 4-star only comps for Gaming.

3. Iansan as Bennett Replacement

For players looking to skip Bennett but retain a strong buffer:

  • Kenich (Mobile Dendro DPS)

    • Burns interact well with Dendro, and Iansan’s passive doesn’t interfere with elemental application.

    • Team Example: Kenich + Iansan + Mavka + Xiangling

  • Chasa (Pyro Bow DPS)

    • Movement while charging arrows keeps Iansan’s buff up.

    • Best when supported by Rosaria or Finina for flexibility.

4. Non-Mobile DPS Compatibility

While not optimal, Iansan still works in static teams:

  • Characters with low movement can still benefit, though the buff decay is faster.

  • Pair with Noblesse Oblige set or Favonius Lance for utility instead of uptime.

Iansan’s Constellations: Scaling Her Support Potential

While Iansan performs well at C0, unlocking her constellations significantly enhances her effectiveness as a team buffer and energy utility. Here's a breakdown of how each constellation impacts her gameplay:

C1 – Energy Cycle Support

  • Effect: Provides a burst of energy refund after using her Elemental Burst.

  • Impact: Allows Iansan to maintain her burst rotation with lower ER investment, making weapon and artifact flexibility easier.

C2 – Enhanced Buff Duration

  • Effect: Extends the duration of her ATK buff or slows the decay rate of Night Soul Points.

  • Impact: One of the most impactful constellations. Helps preserve her buff window, especially in teams with limited movement.

C4 – Improved Night Soul Generation

  • Effect: Boosts the amount of Night Soul Points recovered through active character movement.

  • Impact: Increases the consistency of her burst performance. This constellation supports smoother synergy in non-mobile teams.

C5 – Burst Talent Level Increase

  • Effect: Boosts her Elemental Burst talent by +3.

  • Impact: Raises her ATK buff cap, making her even more competitive with top-tier buffers like Bennett.

C6 – Peak Buffing Capability

  • Effect: Unlocks powerful additional effects tied to Night Soul Point thresholds or team buffs.

  • Impact: At C6, Iansan becomes a premier buffer, especially in 4-star-focused comps, surpassing many limited 5-star supports in niche team roles.

Constellation Summary Table

ConstellationKey BenefitRecommended Priority
C1Energy managementMedium
C2Buff consistencyHigh
C4Night Soul regen improvementMedium-High
C5Increased buff ceilingMedium
C6Max support potentialHigh

Iansan vs. Bennett: When to Use Each Support

Both Iansan and Bennett serve the role of ATK buffers and healers, but their mechanics and situational strengths differ. Understanding when to run Iansan instead of, or alongside, Bennett can significantly improve your team synergy.

Key Differences Between Iansan and Bennett

FeatureIansanBennett
ElementPyro (Electro Resonance Compatible)Pyro
Buff SourceBased on current Night Soul Points and ATKFlat ATK scaling with base stats
Buff DurationBuff decays over time (6/s), but can be restored by movementFixed Circle, static duration
HealingPassive healing tied to movement (60% ATK scaling)Strong Burst healing with HP% scaling
Energy GenerationHigh Electro particle generation via SkillHigh Pyro particle generation via Burst and Skill
Field DependencyWorks off-field and scales with active movementRequires characters to stand in his Burst Circle

When to Use Iansan Instead of Bennett

  • Mobile DPS Characters: Units like Gaming, Verisa, or Mavka benefit from Iansan’s movement-based regeneration.

  • Electro Synergy: When building around Electro resonance or characters who require Electro particles.

  • Circle Aversion: In teams where you want to avoid being locked into Bennett’s burst circle.

When to Use Both Together

  • Double ATK Buff: Iansan and Bennett stack their buffs, resulting in extremely high damage outputs.

  • Specialized 4-Star Teams: Characters like Rosaria or Gaming thrive with stacked buffs and energy refund.

  • Buffer Flexibility: Run Iansan with Fouret Scroll and Bennett with Noblesse Oblige for maximum coverage.

Conclusion: Why Iansan is a Top-Tier 4-Star Support in Genshin Impact

Iansan’s toolkit brings an advanced level of utility and adaptability that rivals even 5-star supports. As a 4-star Pyro character, she offers:

  • Reliable ATK buffs that scale with her total ATK

  • Moderate healing based on movement-linked mechanics

  • Efficient Electro energy generation

  • High synergy with movement-heavy DPS characters

Her ability to replace or complement Bennett makes her highly valuable for team optimization, especially in Genshin Impact’s evolving meta. Whether you’re building a full 4-star team or optimizing high-end constellations, Iansan’s flexibility, build options, and team compatibility make her an essential support choice.

Key Takeaways

  • Iansan excels in mobile combat scenarios where her buff can be sustained.

  • At C0, she is already effective and budget-friendly to build.

  • Equipping her with Fouret Scroll and Favonius Lance creates a cost-efficient, high-value support setup.

  • Works best with characters like Gaming, Verisa, Kenich, Mavka, and Chasa.

  • Offers a viable alternative or complement to Bennett, depending on team needs.

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