Phaethon's Melody

This is the standard build. Fanged Metal gives Physical DMG plus +35% DMG against targets hit by Assault, and Polarized Assault keeps it up almost permanently. 2-piece Phaethon's Melody adds Anomaly Mastery (converted into Proficiency by her Additional Ability) and is the safest choice.

The strongest set if you manage it well. It gives more Anomaly Proficiency, and its DMG bonus doesn't depend on Stun. That matters because Ablooms scale from the Anomaly currently on the enemy. Teammates have to keep casting EX Specials to maintain it, so only pick it if you're willing to swap often. Pair it with 2-piece Freedom Blues or Chaos Jazz.

Her best set for damage, especially in the Angels of Delusion team: she has both high personal damage and strong Anomaly buildup, and most of the damage happens during Stun while teammates spam EX Specials. Pair it with 2-piece Freedom Blues (or Chaos Jazz) for extra Anomaly Proficiency.

The best set and practically made for Promeia: she applies Freeze constantly, so its Anomaly and Disorder DMG bonus is easy to keep up. Its Anomaly Proficiency bonus needs an Abloom, so in Stunner teams consider using one Abloom early before the Stun. 2-piece Phaethon's Melody adds Anomaly Mastery, which turns straight into damage via her Core Passive.

The best set: Phaethon's Melody gives +45 Anomaly Proficiency whenever anyone uses an EX Special Attack and +25% Ether DMG when it's a teammate, working even while she's off-field. Pair with 2-piece Chaos Jazz or Freedom Blues for more Anomaly Proficiency.

The best set: Moonlight Lullaby raises team DMG by 18% for 25s whenever Yuzuha uses an EX Special Attack or Ultimate. 2-piece Phaethon's Melody adds the Anomaly Mastery her Additional Ability needs.

The best set for any Support: a longer, easier-to-trigger team DMG buff than Proto Punk or Swing Jazz, needing only an EX Special or Ultimate. Pair it with 2-piece Phaethon's Melody; Astral Voice, Hormone Punk, Chaos Jazz or Freedom Blues also work.

The best set for a Physical Anomaly DPS: +10% Physical DMG and +35% DMG for 12s against enemies hit by Assault from any squad member, active almost all the time against bosses. 2-piece Phaethon's Melody (Anomaly Mastery) is recommended.

The top choice in Anomaly/Disorder teams (e.g. with Miyabi): her EX Special Attacks cut enemies' Ice Anomaly Buildup RES by 20%, building on Soukaku's strong Ice application. 2-piece Phaethon's Melody adds Anomaly Mastery.