Collei Build & Teams: 4-Star Dendro Bow Off-Field Applicator & Shred

How Collei Works

Collei's value is off-field Dendro application plus shred, not personal damage:

• Skill: throws a boomerang that applies Dendro on the way out and the way back, 12s CD.
• Burst: creates a "Cuilein-Anbar" zone dealing Dendro for 3s; every Dendro reaction inside extends it 1s (up to +3s).
• Deepwood 4pc shreds 30% Dendro RES after her Skill/Burst hit, off-field, so application + shred stay online almost constantly.

Artifacts

Set	2pc	4pc
Deepwood Memories	+15% Dendro DMG	30% Dendro RES shred on Skill/Burst hit (8s, off-field) — best for the applicator build
Gilded Dreams	+80 EM	EM for same-element teammates / ATK for others — when she's the sub-DPS
Tenacity of the Millelith	+20% HP	Team ATK +20% (on-field sub-DPS)

Main & Sub Stats

Slot	Main Stat
Sands	Energy Recharge (top priority — she's very ER-hungry) / Elemental Mastery
Cup	Dendro DMG Bonus / Elemental Mastery
Circlet	Crit Rate / Crit DMG / Elemental Mastery

Sub-stat priority: Energy Recharge (to the 200% threshold) > Elemental Mastery > Crits > ATK. ER keeps her Burst cycling; EM boosts the team's Dendro reactions.

Weapons

Weapon	Rarity	Notes
Elegy for the End	5★	ER + party-wide EM/ATK buff after reactions; best team-support bow
Favonius Warbow	4★	Crit drops energy particles; top F2P applicator bow
Sacrificial Bow	4★	Crit resets Skill CD → extra Dendro application + particles

Team Comps

Aggravate Team (optimal)

Collei (Dendro/shred) + Fischl (off-field Electro) + Raiden Shogun (DPS/Electro) + Kazuha (grouping/shred)

• Collei applies Dendro + Raiden applies Electro → target stays Quicken'd.
• Fischl's Oz triggers Aggravate at high frequency; Raiden's Burst detonates.
• Collei's Deepwood 30% Dendro RES shred amplifies the whole team's Dendro reactions.

Hyperbloom Team

Collei (Dendro/shred) + Xingqiu (Hydro) + Yae/Raiden (Electro) + Baizhu (healer/Dendro)

• Xingqiu applies Hydro + Collei applies Dendro → Dendro Cores spawn.
• Raiden/Yae apply Electro → Cores turn Hyperbloom.
• Collei's Deepwood shred; Baizhu's shield keeps the on-field carry safe.

Constellation Priority

• C4: Each Dendro reaction in the zone extends it 1s (up to +3s), lengthening shred uptime — best value.
• C1: smoother Energy Recharge, lowers the ER requirement.

Related Guides

• Catalyze Reactions
• Dendro Reactions
• Elemental Mastery
• Fischl Teams
• Kaveh Teams

FAQ

Is Collei worth building as a 4-star?

Yes — she's the backbone of F2P Aggravate/Hyperbloom teams. Her Deepwood shred stays online almost permanently, pairing well with an Electro carry.

Collei or Nahida?

Nahida is the stronger 5★ EM-convert main support but requires a pull. Collei is the free, easy-to-get Dendro applicator. Use Nahida if you have her; otherwise Collei is the answer.

Should Collei prioritize ER or EM?

Main stat goes to ER (her Burst costs 60 energy); substats add EM. Push ER to 200%, then fill remaining substats with EM/Crits.

Does Collei need Deepwood?

No. For a pure applicator, Deepwood gives the best shred. As a sub-DPS, use Gilded Dreams or Tenacity. Without full Deepwood, 2pc + any 2pc works as a starter.

What teams fit Collei?

Teams with an Electro carry (Raiden, Keqing, Fischl) for Aggravate, or a Hydro applicator for Hyperbloom. Core idea: she applies Dendro, others apply Electro/Hydro.