2.6 Phototaxis, but without 6-Star Units Pt 8: Process of Elimination (Reverse: 1999)
0Team: X (R10 / P5), Baby Blue (R10 / P5), Tennant (R10 + Elucidation / P5), Leilani (Maxed Out), Mesmer Jr (Level 1), AliEn T (Level 1), Sweetheart (R10 + Aspirational / P5), White Rum (Insight 2)
This is a pretty simple fight. Both bosses work like their playable versions (Thirty Seven gets Eureka when using her incantations or when Lilya uses a follow up) with some extra buffs (Thirty Seven will Riposte when attacked). Despite how scary that sounds, the bosses have no CC immunity at all. Just one Ult from AlienT will prevent Thirty Seven from using any Ripostes for a turn and from there, you can easily lockdown the bosses with CCs.
Since I was running the Impromptu powerup (which makes it hard to use Nightmare), I ended up using Daze from White Rum, Mesmer Jr and Sweetheart. Adding X too (for Disconcert) was honestly overkill, but when else am I going to get to use him?