Best Denia Build Guide 2026

Complete build guide for the Fusion Rectifier Sub-DPS

Fusion Sub-DPS Rectifier S-Tier

Updated: May 2026 Version: 3.3+ Reading time: 6 min

Quick Navigation

1. Character Overview
2. Best Build
3. Skill Analysis
4. Team Compositions
5. Resonance Chain
6. Upgrade Materials
7. FAQ

1. Character Overview

Denia is a 5-star Fusion Rectifier Sub-DPS who can switch between Fusion Burst and Tune Strain modes. She provides massive team buffs and off-field damage through her Erosion Field.

Why Build Denia?

Dual-mode flexibility
Massive team buffs (40% Fusion Burst amp)
Off-field damage via Erosion Field
Enables two different team archetypes

Role in Team

Off-field Sub-DPS and support. Denia applies buffs and debuffs, then swaps out while her Erosion Field ticks damage.

2. Best Build

Weapons

BEST IN SLOT

Forged Dwarf Star

5-Star | ATK% Substat

Signature weapon. Grants 12% Fusion DMG Bonus. Casting Intro Skill gives Star Marking (+24% Resonance Skill DMG for 12s). Casting Resonance Skill gives Ethereal Endowment (+24% Resonance Skill DMG for 12s). Perfectly synergizes with her kit.

ALT 5-Star

Stringmaster

5-Star | Crit Rate Substat

Strong alternative 5-star weapon. Increases ATK by 12% and Skill DMG by 24% (stacks 2x) after Intro/Liberation. Good crit stick if you need more Crit Rate.

ALT 5-Star

Lethean Elegy

5-Star | Crit DMG Substat

Increases Energy Regen by 12.8%. After Resonance Skill, Liberation DMG +7% (stacks 3x, 12s). Good for faster Liberation uptime. Obtainable free at Union Level 45.

F2P

Augment

4-Star | ATK% Substat

Best craftable 4-star option. Provides consistent ATK% and good base stats. Easy to obtain and refine for free-to-play players.

Echoes (Sonata Effects)

Best Set: 5-piece Chromatic Foam (increases Fusion DMG)

Alternative: 2-piece Chromatic Foam + 2-piece Lingering Tunes (if substats are better)

Slot	Main Echo	Main Stat Priority
Cost 4	Lioness of Glory	Crit Rate% or Crit DMG%
Cost 3	Any Fusion Echo	Fusion DMG%
Cost 3	Any Fusion Echo	Fusion DMG%
Cost 1	Any Echo	ATK%
Cost 1	Any Echo	ATK%

Substats Priority

Crit Rate% > Crit DMG% > ATK% > Resonance Liberation DMG% > Energy Regen%

Aim for 70-80% Crit Rate before stacking Crit DMG. Lioness of Glory (main echo) provides buffs after summoning, so prioritize using it before her burst combo.

3. Skill Analysis

Normal Attack: Erosion Strike Priority: Medium

Performs up to 4 consecutive Fusion DMG attacks. The 4th attack deals increased damage. During Erosion State (after Intro Skill or complete Basic Attack chain), her attacks are enhanced and count as Resonance Skill DMG.

Use this to build up to her enhanced state. The 4-hit combo is important for transitioning into her burst window.

Resonance Skill: Erosion Field Priority: High

Deploys an Erosion Field dealing Fusion DMG. Available during Erosion Strike state. Enhanced version after completing Enhanced Basic Attack chain. Consumes Erosion stacks for bonus damage. After use, grants Unison effect, allowing her to trigger Outro Skill without Concerto Energy.

This is her core damage source. The Unison effect enables incredibly quick team rotations - use this, then immediately swap to your next character.

Resonance Liberation: Purge of Flames Priority: HIGHEST

Invokes the power of Fusion to deal massive AoE Fusion DMG. This is her burst ability, best used when all buffs are active and she has high Erosion.

Use this during her main burst window, ideally after building up Erosion and with Lioness of Glory echo buff active.

Forte Circuit: Erosion System Priority: High

Denia gains Erosion when party members deal Attribute Damage or Coordinated Attacks (1 stack per second, max 40). She can consume Erosion to enhance her attacks. At 40 Erosion, teammates gain Eras in Unity, enhancing their attacks.

The more different attributes in your team, the faster she builds Erosion. This is why she works well with diverse teams.

Intro Skill: Fusion's Halo Priority: Medium

Deals Fusion DMG when switching into Denia. Triggers her Erosion State, enabling her enhanced attack combo.

Always try to switch to Denia with Intro Skill active to start her enhanced combo immediately.

Skill Level Priority

Basic Attack > Resonance Skill > Resonance Liberation > Forte Circuit > Intro Skill

4. Team Compositions

Denia's Forte Circuit benefits from having multiple different attributes in the team. The more diverse your team, the faster she builds stacks.

Best-in-Slot Team

Denia (Sub-DPS) Aemeath (DPS) Mornye (Support)

Aemeath provides Main DPS damage. Mornye offers healing and buffs. This team covers 3 attributes (Fusion/DPS/Support) for fast Erosion generation.

High Damage Alternative

Denia (Sub-DPS) Luuk Herssen (DPS) Lynae (Heal)

Luuk Herssen provides Tune Strain synergy. Lynae heals and provides buffs. Strong damage output with good survivability.

F2P Friendly Team

Denia (Sub-DPS) Chixia (DPS) Baizhi (Heal)

Chixia at RC6 provides healing and good damage. Baizhi is a free 4-star healer available to all players. Budget but effective for all content.

Rotation Tips

Start with Support skills (apply buffs/debuffs with Sub-DPS and Support)
Switch to Denia using Intro Skill to enter enhanced state
Complete Enhanced Basic Attack chain (4 hits)
Use Resonance Skill
Complete another Basic Attack chain
Use Enhanced Resonance Skill (consumes stacks)
Use Resonance Liberation if available
With Unison active, switch to next character immediately
Repeat when Concerto Energy is ready

5. Resonance Chain (Sequence Nodes)

Abyssal Ascension: When casting Basic Attack or Erosion Field, gain 1 stack of Herald of Revival (max 4, lasts 6s). When casting Purge of Flames, consume all stacks - each stack increases its DMG by 20% (up to +80% total).

Chronofrost Repose: Recovers 40 Erosion after being out of combat for 4+ seconds. Triggers once every 4 seconds. Excellent for quick-swap playstyle.

Celestial Incarnate: Gain 12 Erosion and 1 stack of Immortal's Descendancy after Intro Skill. Each stack increases ATK by 25% (max 2 stacks, lasts 20s).

Benevolent Grace: When casting Liberation or Purge of Flames, all nearby teammates gain +20% Attribute DMG Bonus for 20s. Team-wide buff.

Frostfire Illumination: Liberation (Purge of Flames) DMG Multiplier increased by 120%. Massive burst damage spike.

Thawing Triumph: Purge of Flames DMG Multiplier increased by 45%. Erosion consumption bonus increased by 71%. Maximum power spike.

Worth Pulling?

S1 is the sweet spot for most players (+80% skill damage is huge). S2 is excellent for quick-swap teams. S4 makes her a team buffer. S6 is whale territory but transforms her into the highest DPS in the game.

6. Upgrade Materials

Materials needed to ascend Denia to 6✦ and level all main skills to 10:

Ascension Materials (0✦ → 6✦)

Shell Credit170,000

Fusion Shard46

Dream of Stars60

Mech Core26

Boss materials drop from world bosses. Local materials can be found in their respective regions or purchased at Shifang Pharmacy.

Skill Materials (All Main Skills to 10)

Shell Credit630,000

Waveworn Residue 2263

Waveworn Residue 23516

Waveworn Residue 23912

Mech Core3

Mech Core16

Mech Core12

Sentinel's Dagger6

Waveworn Residue drops from Eroded Ruins (Wuming Bay). Sentinel's Dagger drops from weekly bosses. Boss materials drop from world bosses.

Total Shell Credits Needed

~20.3 million Shell Credits total for full ascension + all skills. Start saving early!

7. Frequently Asked Questions

Is Denia worth building without her signature weapon? ▼

Yes. Denia performs well even without Forged Dwarf Star. The 4-star craftable 'Augment' provides about 75-80% of her signature weapon's damage, which is still enough to clear all endgame content.

What is the minimum Resonance Chain needed? ▼

S0 is completely viable. S1 provides a massive damage boost to her Liberation. S2 improves her Erosion generation. S4 is excellent for sustained damage. S6 is whale territory but provides the highest DPS ceiling.

Should I prioritize Crit Rate or Crit DMG? ▼

Aim for a 1:2 ratio with Crit Rate around 70-80%. It's better to have consistent crits than occasional huge numbers. If using Forged Dwarf Star (ATK% substat), you can focus more on Crit Rate in your echoes.

How does Denia compare to other Fusion supports? ▼

Denia is unique because she can switch between Fusion Burst and Tune Strain modes, making her more flexible than other Fusion supports. She provides higher buffs but requires more careful rotation management.

What team composition is best for F2P players? ▼

Denia + Chixia + Baizhi is the best F2P team. All supporting characters are free or farmable, and it covers all content comfortably.

Disclaimer: Build recommendations are based on official game data and community testing as of Version 2.0. Game updates may change character balance, echo sets, and optimal builds. Always verify in-game before investing rare resources. Last updated: May 2026.