Arknights Endfield Ardelia Build Guide

Ardelia stands out as one of the most versatile Supporters in Arknights: Endfield, combining powerful debuffs with consistent healing. What most players miss is how her Corrosion application creates a damage multiplier for your entire team. Here's how to build her for maximum impact.

What Makes Ardelia Powerful?

Ardelia brings something unique to the battlefield: she's the only character who can apply Corrosion solo and immediately consume it for massive debuffs. Her Battle Skill, Dolly Rush, slaps enemies with both Physical and Arts Susceptibility, increasing the damage they take from your entire team. Meanwhile, her Talent spawns healing zones that keep everyone topped up without micromanagement.

You'll want her in almost every team composition. She fits naturally into Heat teams by supporting Laevatain, Electric teams alongside Perlica, and even Physical-focused squads. The key here is understanding her rotation.

Best Weapons for Ardelia

Dreams of the Starry Beach (Best-in-Slot)

Dreams of the Starry Beach transforms Ardelia from good to exceptional. When you consume Corrosion with her Battle Skill, enemies take an additional 28% Arts damage for 25 seconds. That's massive for Arts-heavy teams.

The weapon provides:

• Intellect +156 at max refinement
• Treatment Efficiency +46.4%
• Infliction passive that amplifies Arts damage taken

Pro tip: The Arts damage amplification stacks multiplicatively with her Physical and Arts Susceptibility debuffs, creating absurd damage windows.

Alternative Weapons

If you don't have her signature weapon, Monaihe serves as a solid alternative. It boosts Ultimate Gain Efficiency by 37.1%, letting you spam Wooly Party more frequently for additional healing. For early progression, Freedom to Proselytize works perfectly—you can grab it from Stock Redistribution without spending premium currency.

Optimal Gear Setup

Eternal Xiranite Set (Endgame Build)

The Eternal Xiranite set creates a feedback loop with Ardelia's debuffs. Here's how it works:

Set Bonus: After applying Susceptibility or Weakened, all teammates gain +16% damage dealt for 15 seconds.

The beauty of this set is timing. You apply Physical and Arts Susceptibility with Dolly Rush, triggering the set bonus immediately. Your DPS characters then unleash their biggest attacks during this damage window.

Eternal Xiranite gear stats

Early Game Alternative: Mordvolt Resistant

Before you can craft Eternal Xiranite, the Mordvolt Resistant set provides excellent sustain. The 3-piece bonus grants +50 Will and increases Treatment Effect by 30% when your HP drops below 50%. Stack Treatment Bonus substats on the Gloves and both Kit pieces to maximize healing output.

Team Compositions 

F2P Corrosion Team

This rotation maximizes Corrosion uptime using only guaranteed characters:

Team: Endministrator, Chen, Akekuri, Ardelia

Rotation:

1. Use Endministrator's Basic Attack until Final Strike to trigger Ardelia's Combo Skill (applies Corrosion)
2. Immediately cast Ardelia's Battle Skill to consume Corrosion and apply Physical/Arts Susceptibility
3. Trigger Chen's Combo Skill with Endministrator's Ultimate or Battle Skill
4. Consume Vulnerability stacks with Endministrator's Battle Skill
5. Use Akekuri's Combo Skill during stuns to restore SP

For more team building strategies, check out our Arknights Endfield Team Comp Guide.

Eruption Column Corrosion

Heat Amplification Team

Team: Laevatain, Wulfgard, Akekuri, Ardelia

This composition leverages Ardelia's debuffs to amplify Laevatain's already devastating Heat damage. Wulfgard and Akekuri apply Heat Infliction stacks, building Laevatain's Melting Flame counter. When Laevatain unleashes her burst, Ardelia's Physical and Arts Susceptibility multiplies the damage output.

The rotation flows naturally: apply Corrosion with Ardelia's Combo Skill, consume it with Dolly Rush for Susceptibility debuffs, then let Laevatain convert Heat stacks into massive damage.

Combat Rotation

Opening Sequence

Start every encounter with Ardelia's Basic Attack (Rocky Whispers) to build SP while dealing consistent Nature damage. The fourth sequence in her Basic Attack chain deals 18 Stagger, setting up Final Strike opportunities.

When you land a Final Strike on an enemy without Arts Infliction, you automatically trigger Eruption Column. This Combo Skill launches a Volcanic Cloud that applies temporary Corrosion to nearby enemies.

Corrosion Consumption Loop

Here's the thing most players miss: Ardelia can trigger her Battle Skill twice in one cast thanks to her Mountainpeak Surfer Talent. If Corrosion exists on a nearby enemy when you activate Dolly Rush, it immediately casts again for free. This creates three healing zones instead of one, dramatically increasing sustain.

The double-cast mechanic means you want to position Ardelia near multiple enemies when possible. Each Dolly Rush spawns three Shadows of Mr. Dolly—healing zones that restore HP based on your Will stat. With the free recast, you're creating six healing zones per rotation.

Ultimate Usage

Wooly Party serves two purposes: emergency healing and sustained pressure. During the 3-second channeling window, Ardelia becomes mobile while spawning multiple Mr. Dolly copies that deal Nature damage. Each copy has a 10% chance to create additional healing zones.

Save your Ultimate for:

• Wave transitions when you need burst healing
• Grouped enemies to maximize damage and healing zone spawns
• Low HP situations where consistent healing zones aren't enough

Skill and Stat Priorities

Level these skills in order:

1. Dolly Rush (Battle Skill) - Your primary healing and debuff source
2. Eruption Column (Combo Skill) - Increases overall rotation damage
3. Wooly Party (Ultimate) - Solid damage increase for burst windows
4. Rocky Whispers (Basic Attack) - Keep at base level initially

For Talents, max Friendly Presence first. The healing scales with Will, and higher levels dramatically increase the HP restored per healing zone. Mountainpeak Surfer only has one level but provides incredible value—it's unlocked automatically.

Ardelia scales differently than most Supporters. Here's what matters:

Primary Stats:

• Will: Directly increases healing from Friendly Presence
• Intellect: Boosts Arts damage and Treatment Efficiency
• Arts Intensity: Amplifies debuff effectiveness

Secondary Stats:

• Ultimate Gain Efficiency: More frequent Wooly Party casts
• Treatment Bonus: Multiplicative healing increase
• HP: Survivability in extended fights

You'll notice her base stats favor Intellect (20) and Will (15) over other attributes. This makes her naturally suited for healing and debuff application rather than raw damage output.

Common Mistakes to Avoid

Don't waste Corrosion on enemies with existing debuffs. Eruption Column only triggers when hitting enemies without Vulnerability or Arts Infliction. If your team already stacked debuffs, you're better off using a different character's Final Strike.

Avoid casting Dolly Rush without Corrosion present. The free recast from Mountainpeak Surfer only works if Corrosion exists on a nearby enemy. Without it, you're getting half the healing zones and missing the double-debuff application.

Stop ignoring healing zone positioning. The Shadows of Mr. Dolly are stationary. Position your controlled operator to path through multiple zones during combat, maximizing HP recovery without interrupting your damage rotation.

Advanced Synergies

Ardelia's Corrosion application opens unique combo opportunities. When paired with characters who consume Arts Inflictions for bonus effects, you create powerful feedback loops.

For example, combining her with Nature-focused DPS creates constant Corrosion cycles. The enemy takes increased damage from all sources while your team maintains high HP through healing zones. This sustain advantage lets you tackle content above your power level.

The key is understanding that Ardelia excels in extended fights. Quick burst encounters don't leverage her full potential, you want battles where her healing zones and consistent debuff application create sustained advantages.

For automated resource generation strategies that complement Ardelia's playstyle, check out our Arknights Endfield AIC Factory Guide.

Is Ardelia Worth Building?

Absolutely. She's one of the few characters who provides both sustain and damage amplification in a single slot. Her free availability through the Awakening Sign-In event means every player can access her kit without gacha investment.

What makes her particularly valuable is versatility. Unlike element-specific Supporters, Ardelia fits into any team composition. Heat teams benefit from her debuffs, Electric teams appreciate the sustain, and Physical teams love the Susceptibility application.

You'll find yourself using Ardelia in most content, from story missions to endgame challenges. Her combination of healing, debuffs, and Arts damage creates a foundation that supports multiple playstyles and team archetypes.