The Brimstone

The most used W-Engine on Zhu Yuan and nearly as strong as the top pick: Basic Attacks, Dash Attacks and Dodge Counters stack ATK. Each stack has its own timer and only one can be gained every 0.5s, so you need constant attacks to keep it maxed.

Very strong because his quiver hits count as Basic Attacks and he dashes constantly; it needs some ramp-up but stacks fast, so most of his burst runs at full stacks. Since Harumasa is saturated on other stats, its ATK is especially valuable, and at higher refinements it can become his best option.

The best non-limited option: it has no CRIT Rate, so nothing is wasted, and her multi-hit Basic Attacks keep its ATK stacks near full. At S5 its effect doubles and only her Signature beats it.

A surprisingly great fit: almost all her Enlightened Mind damage comes from Basic Attacks, so its ATK stacks are easy to keep, and the lack of CRIT Rate avoids overcapping. At S1 it already beats every A-Rank and nearly matches Severed Innocence; at S5 it's less than 10% behind her signature.

Billy's best Standard engine. His loop of Basic Attacks, Dash Attacks and Dodge Counters keeps its ATK stacks up almost constantly. At S5 it's his strongest option. The catch is that it has no CRIT Rate and low Base ATK, which makes building around it harder.

Soldier 11's signature, which stacks ATK from Basic Attacks, Dash Attacks and Dodge Counters. It suits an on-field Anton. Each stack has its own timer, so you need to keep attacking to keep it maxed.

Her signature and the most used option. Outside Stun it's at full stacks almost all the time, only dipping during burst combos. It beats every A-Rank option and even some limited ones, so it's both strong and easy to get.

An accessible standard S-Rank: Seed's Basic Attack focus keeps its ATK stacks high, but it has no CRIT, often forcing a CRIT Rate Disc 4, and it weakens next to Astra Yao due to ATK oversaturation. S5 Marcato Desire is the best A-Rank option.