Luuk Herssen Build Guide: Best Echo Set, Weapons & Teams | WuWa 3.1

WuWa 3.1 just introduced Luuk Herssen, Startorch Academy’s resident “school doctor”… and the community immediately went: why does the counselor look like he files incident reports with his fists? If you like stylish Spectro characters, morally-grey lore energy, and a kit that’s clearly designed to feel satisfying in real fights, you’re in the right place.

This guide breaks down what actually matters for building Luuk—so you can decide if he’s worth your pulls, and if yes, how to make him hit like he means it.

 

Luuk Overview

Rarity: ★★★★★   |   Element: Spectro   |   Weapon: Gauntlets

Luuk Herssen is Startorch Academy’s school doctor-turned-mystery-man—reliable on the surface, “knows everyone’s secrets” energy underneath—and he’s a 5★ Spectro / Gauntlets main DPS, not a healer.

He’s a Basic-ATK main DPS built around an aerial pressure loop: stay airborne, chase targets, and cycle Aureole of Execution through its three forms (Scalpel → Shortblade → Longblade) to keep combos flowing. His kit also plays heavily into Tune Strain: he can set up Shifting, then convert/cash in on Interfered, where his damage ramps much harder—especially if the team feeds him Tune Break Boost to amplify those hits. And right now, Lynae is the standout source of a full +40 Tune Break Boost package, so she’s the premium partner for max payoff.

 

Luuk Materials Overview

Suncoveter's Reach 46	Exoswarm Pendant 29/40/52/61	Waveworn Shard 25/28/55/67
New Weekly Boss materials 26	New Collectibles 60	Premium Resonance Potion 122

Already checking Luuk’s mats? Slide into the pre-farm guide next—grab everything early so WuWa 3.1 Luuk Herssen hits the field day one.

 

Luuk Best Weapon Choices

Signature Weapon

Spine of Day

Attack: 588      Crit DMG: 24.3%

Attack increased by 12%. Each time you cast variation skills or resonance skills, basic attack damage increases by 20% for 6 seconds.

When causing basic attack damage, the diffraction damage bonus is increased by 20% and ignores 10% of the target's defense for 4 seconds.

Spine of Day is Luuk’s “keep swinging, keep winning” toy: he’s a Basic-attack aerial DPS who’s constantly weaving Resonance Skill/Variation swaps, so the sword’s short Basic DMG ramp stays up almost all the time. Then every Basic hit gets extra Spectro punch and a bit of DEF bypass—rare, boss-friendly value. Great if you’re maining Doctor Luuk; just okay as a hand-me-down (Zani/Lingyang can use it).

 

Alternative

Pulsation Bracer	Pulsation Bracer is the “Interfered grinder” pick: Luuk loves hitting Tune Strain – Interfered targets (his kit directly amplifies those hits), and this gauntlet stacks Basic ATK DMG fast on that same condition—perfect for his rapid air strings and Basic-tagged cash-outs.
Blazing Justice	Need a “no-drama punch-through” option? Blazing Justice fits because Luuk’s ult and several follow-ups are treated as Basic Attack DMG, so the Basic-triggered DEF ignore keeps paying off across his whole string. The Spectro Frazzle boost is bonus value in Frazzle comps.
Aether Strike	Aether Strike plays like a neat little timer buff: press Resonance Liberation, get an ATK bump + Liberation DMG for 15s, then keep swinging. Luuk can ult mid-air and immediately continue his aerial loop, so the buff window overlaps his highest-tempo damage nicely.

 

Luuk Best Echo Sets

Best-in-Slot

Main Echo	Echo Set
Twin Nova: Nebulous Cannon	Rite of Gilded Revelation
Transform into a Twin Nova: Nebulous Cannon to slash enemies twice, with each attack dealing 80.51% Spectro DMG. The Resonator with this Echo equipped in the main slot gains 12.00% Spectro DMG Bonus and 12.00% Basic Attack DMG Bonus. CD: 8s.	2-Pc: Spectro DMG + 10% 5-Pc: Dealing Basic Attack DMG increases Spectro DMG by 10% for 5s, stacking up to 3 times. With 3 stacks, casting Resonance Liberation grants 40% Basic Attack DMG Bonus.

Rite of Gilded Revelation fits Luuk because he’s a Basic-attack–centric Spectro DPS who’s constantly hitting, so the set’s stacking Spectro boost is easy to build and maintain. At 3 stacks, his Liberation opens a Basic DMG window. Twin Nova adds extra Spectro hits plus main-slot Spectro/Basic bonuses for smoother air loops.

 

Alternative

Main Echo	Echo Set
Mourning Aix	Celestial Light
Transform into Mourning Aix and perform 2 consecutive claw attacks, each attack dealing 157.44% and 236.16% Spectro DMG respectively. After the transformation, increase current character's Spectro DMG by 12.00% and Resonance Liberation DMG by 12.00% for 15s CD: 20s	2-Pc: Spectro DMG + 10%. 5-Pc: Spectro DMG + 30% for 15s after releasing Intro Skill.

Celestial Light loves Luuk’s tag-in rhythm: teammates Outro into him, he Intro’s, and boom—15 seconds of Spectro DMG to juice his airborne Basic chains. Mourning Aix gives a quick double-swipe, then buffs Spectro + Liberation DMG for the same window, so his opener flows and his ult hits harder.

 

Echo Stats Priority

Main Stats:

COST 4	Crit DMG / Crit Rate
COST 3	Spectro DMG Bonus / ATK%
COST 1	ATK%

Sub Stats:

Aim for ~125% Energy Regen (ER). Then prioritize CRIT DMG & CRIT Rate > ATK% > Basic Attack DMG Bonus.

 

 

Luuk Skill Upgrade Priority

Level Resonance Liberation first because that’s where Luuk’s “big moment” burst sits—your cleanest damage spike when you finally cash out the loop. Forte Circuit comes next since it upgrades the whole engine: Ichor Flow management, the Aureate Judge window, and those boosted follow-ups. Resonance Skill after for smoother aerial routing, form cycling, and keeping pressure on targets. Normal Attack looks “Low” on paper, but you still take a few levels because Luuk’s core DPS is built on fast Basic strings in the air. Intro Skill stays last—nice for entry flow, not for damage.

Resonance Liberation	⭐⭐⭐⭐⭐ (Top)
Forte Circuit	⭐⭐⭐⭐ (High)
Resonance Skill	⭐⭐⭐ (Medium)
Normal Attack	⭐⭐ (Low)
Intro Skill	⭐ (Lowest)

 

Luuk Pull Recommendation

0+0 / 0+1 (best value)

If you just want Luuk online, 0+0 already delivers the aerial Basic-attack loop + Skill cycling. For pure bang-for-buck, go 0+1: Spine of Day keeps his Basic DMG ramping while he spams Golden Reflux / Aureole forms, then adds Spectro punch + a little DEF bypass for bossing.

2+1 (big upgrade, especially with Lynae)

S2 is the “numbers finally get rude” breakpoint: his Liberation multiplier jumps, and his Interfered damage scaling from Tune Break Boost effectively doubles. If you run Lynae’s 40 Points Tune Break Boost, Luuk’s Interfered windows get way scarier—then the sig weapon just makes the whole rotation hit harder and smoother.

6+1 / 6+5 (hard whale, crazy solo power)

At S6, he turns team Tune Breaks into personal fireworks: after anyone triggers Tune Break, his Aureole chain + Gavel hits gain a long target-focused damage amp, and his Endnotes stacks can turbocharge Liberation damage up to a huge cap. Add the “free +2 Interfered stacks” rule and he starts melting elites like it’s personal.

 

Luuk Best Team Comps

Luuk

Lynae

Mornye

This is the “make Interfered go brrr” squad. Lynae’s teamwide 40 Tune Break Boost supercharges Tune Break/Interfered payoffs, while Mornye brings sustain + buffs and helps your team trigger Tune Break more smoothly. High ceiling, very boss-friendly.

Luuk

Sanhua

Shorekeeper

If you like quick-swaps, this one slaps. Sanhua’s Outro is basically “Luuk, here’s Basic Attack DMG Deepen—go swing,” and Shorekeeper brings premium buffs/healing (often stronger than Verina) but wants cleaner rotations and a bit more field time.

Luuk

Rover: Spectro

Verina

The comfy, all-purpose lane: Verina keeps everyone alive and hands out big team buffs (ATK + All-Type DMG Deepen), while Spectro Rover can play sub-DPS/buffer duty so Luuk stays on-field looping aerial Basics. Less peak than Lynae, more consistency.

 

Conclusion

If you take one thing from this guide, it’s that Luuk rewards consistency over gimmicks: keep his uptime high, align your buffs with his burst window, and choose gear that supports his “air pressure → finisher” rhythm. Once your build decisions are pointed in the same direction—leveling, stats, Echoes, and teammates—the character starts feeling like a dependable carry for real content.

And if you’re already committed to finishing the setup (weapon pity, resonance chain breakpoint, the whole plan), topping up Arknights: Endfield via LDShop is an easy way to close the gap without derailing your pulls.