Recommended sets
Recommended disc sets, best first. Run a listed 4-piece with any of its 2-piece options.
Woodpecker Electro
4-piece · top pick
Pair with 2-piece:
Branch & Blade SongBest
Hormone Punk
Astral Voice
Puffer Electro4-piece alone also works while you're still farming a 2-piece.
Shadow Harmony
4-piece
Pair with 2-piece:
Woodpecker ElectroBestBranch & Blade SongPuffer Electro4-piece alone also works while you're still farming a 2-piece.
Puffer Electro
4-piece
Pair with 2-piece:
Woodpecker ElectroBestBranch & Blade SongHormone PunkAstral Voice4-piece alone also works while you're still farming a 2-piece.
Main stats
Main stats this build wants in the variable slots. Any listed stat is accepted.
Slot 4
Slot 5
Slot 6
Slots 1–3 are fixed by the game:
How much this build values each substat when scoring a disc. Anything not listed is a dead roll.
Final combat stats to aim for. Hit them all and this agent is endgame-ready.
ATK
2400
HP
9000
DEF
800
CRIT Rate
70%
CRIT DMG
140%
No mindscape notes have been written for this agent yet.
Guidance
Billy shares a stat profile with Corin and Nekomata almost exactly: CRIT DMG and CRIT Rate tied at the top of his weights, ATK% behind them, and targets of 70% CRIT Rate, 140% CRIT DMG and 2,400 ATK. If you are gearing more than one of the three, discs pulled for any of them suit the others. Where he differs is his set list. Fourteen loadouts sit across three 4-piece options headed by Woodpecker Electro, with Shadow Harmony and Puffer Electro behind it, and the top choice accepts four different 2-piece partners. His main stats are middling in strictness: slot 4 takes either crit stat, slot 5 takes PEN Ratio, ATK% or Physical DMG, and slot 6 is ATK% only. Slot 6 is the one to check first if a disc scores worse than it looks. Nothing about his build is demanding. Meeting 70% CRIT Rate is the only target likely to take real farming.
Where this comes from
The recommended sets, main stats and stat targets on this page are adapted from Prydwen. The substat weights, grade thresholds and any scoring shown against them are Wisplight's own, derived from that build rather than published by Prydwen. Last updated Aug 8, 2026.