Zenless Zone Zero W-Engine Guide: Best Weapons for Every Agent Type (2026)
W-Engines are the weapon system in Zenless Zone Zero, equippable spherical devices that grant stat bonuses and powerful passive effects tied to each agent's combat role. Unlike some gacha games where weapons are secondary, the right W-Engine in ZZZ can increase an agent's damage output by 20 to 40 percent over a mismatched option. This guide explains how W-Engines work, which are best in class for each role, and which free alternatives are good enough to skip expensive pulls.
W-Engine Basics: Types, Refinement, and Upgrading
Every W-Engine has a type — Sword, Handgun, Rocket Launcher, Gauntlet, Mallet, or Coils — and can only be equipped by agents that share that weapon type. W-Engines come in S-Rank (limited or Stable Channel), A-Rank (Stable Channel, crafting, events), and B-Rank (drops, crafting). Refinement stacks passive effects: an S-Rank at Refinement 1 is typically stronger than an A-Rank at Refinement 5 for most DPS roles, but some A-Rank W-Engines at high refinement rival or beat S-Ranks for support roles. Upgrade W-Engines using W-Engine Power Supplies and Dennies, and prioritize your main DPS's weapon to max level (60 at Phase 4, raising with the character's advancement) before touching support weapons.
Best S-Rank W-Engines by Role
For Attacker-type agents, exclusive S-Rank W-Engines (signature weapons pulled from the W-Engine banner) are almost always the strongest option. Ye Shunguang's exclusive (a Sword) amplifies Physical DMG during Enlightened Mind, while Miyabi's exclusive Mallet dramatically increases Ice DMG and Fallen Frost stack generation. For Stun agents like Nangong Yu, her exclusive Coils weapon boosts Daze buildup and extends stun duration. For Support agents, Sunna's exclusive Mallet buffs her entire team's ATK share. If you pull a limited S-Rank agent, seriously consider saving for their signature W-Engine on the concurrent W-Engine banner — the bonus is consistently larger than switching from an A-Rank to a different S-Rank that is not exclusive to them.
Best Free and A-Rank W-Engines
The Demara Battery Mark II (A-Rank Coils) is a top-tier free option for Stun agents, obtainable through the Stable Channel at guaranteed rates. The Fusion Compiler (A-Rank Coils for Anomaly agents) reaches near-S-Rank performance at Refinement 5 and is farmable through the Hollow Zero shop. For Attacker-type agents, Starlight Engine (A-Rank Sword) from the monthly Inter-Knot Medal shop provides a consistent ATK% and CRIT Rate bonus that scales well. Always check the Hollow Zero currency shop (Revamped Residual Memory) each reset — it stocks rotating A-Rank W-Engines that would otherwise require banner luck. Patch 2.8 (May 2026) added Lucia's Dreamlit Hearth to the W-Engine banner as an additional strong support option.
Matching W-Engines to Stats: What to Prioritize
The main stat bonus on every W-Engine is fixed by type: most Attacker W-Engines offer ATK%, most Stun W-Engines offer CRIT Rate or Daze Efficiency, and most Support W-Engines offer Energy Regen or HP%. When evaluating passives, prioritize: (1) passives that trigger reliably within your playstyle — a passive that activates on Perfect Dodge is useless if you rarely use dodge; (2) passives that stack with your Drive Disc bonuses rather than overlap them; (3) multi-target passives over single-target ones if you spend most time in Hollow Zero's multi-enemy rooms. Avoid the trap of equipping a higher-rarity W-Engine just because it is rarer — a well-matched A-Rank at Refinement 5 routinely outperforms a mismatched S-Rank at Refinement 1.
W-Engine Banner Strategy: When to Pull vs. Skip
The W-Engine banner (Stable Channel W-Engine Search) runs alongside each limited agent banner and features that agent's exclusive weapon. The 50/50 system on W-Engine banners has a hard pity at 80 pulls instead of 90, and the guaranteed on-banner rate is 75%. Pulling the signature weapon is highest value for your main DPS when you plan to keep using that agent for multiple patches. For support agents, the value is lower because support exclusive W-Engines have a smaller damage differential from their A-Rank alternatives. A safe heuristic: only pull a W-Engine banner if you have 80 pulls saved or hold a guaranteed (won the last 50/50 on the W-Engine banner). Otherwise, farm A-Rank alternatives and save Polychrome for agent banners.
FAQ
Can I transfer a W-Engine between agents?
Yes. W-Engines are not permanently locked to an agent. You can freely swap them in the equipment menu as long as the receiving agent matches the W-Engine's type. There is no cost or cooldown for swapping.
Is it worth maxing a B-Rank W-Engine early?
Only if you have no A-Rank option for that weapon type. B-Rank W-Engines have a lower stat ceiling and weaker passives. Use them as placeholders until you pull or craft an A-Rank alternative, then repurpose the upgrade materials.
How many W-Engines should I upgrade at once?
Focus on one per team member — the main DPS first, then stun, then support. W-Engine Power Supplies are a limited resource in the early game, and spreading upgrades thin results in everyone having mediocre weapons rather than your carry having an excellent one.
Does refinement matter enough to pull duplicates?
For S-Rank W-Engines, Refinement 2 is a reasonable stopping point if you have a second copy. Refinement 5 requires five total copies and is not expected of free-to-play players. For A-Rank W-Engines like the Fusion Compiler, Refinement 5 is realistic through Hollow Zero farming and is worth pursuing for your main team.