Practiced Perfection

Her best option by a clear margin. You get 60 Anomaly Mastery (worth 96 Anomaly Proficiency through her Additional Ability), ATK% and up to +40% Physical DMG right from the start of combat. The high Mastery also lets her build Assault fast enough to Disorder on her own.

The best limited W-Engine at S1: more Physical DMG, more Anomaly Buildup from its Anomaly Mastery, and no buff management, so it's comfortable even with teammates who have long skills like Remielle. Its ATK% main stat makes her Anomaly Proficiency target harder to reach.

Alice's signature is her best choice, bar none: high base ATK plus ATK%, Anomaly Mastery and plenty of Physical DMG, exactly the stats Piper wants.

Alice's signature comes very close to Burnice's own. Its large Anomaly Mastery bonus lets you run an Energy Regen Disc 6. It's slightly less flexible, but strong and easy to use.

Gives plenty of ATK and Anomaly Mastery. Since Anomaly Mastery is separate from Anomaly Buildup Rate, it scales very well on Grace and sits just barely behind Timeweaver.