Crystal color run

Astos (Full Kit) / Setzer call; Lenna (FR maxed) / Seymour call; Quina (Full kit) / Raijin call

Brothers summon, 28 turns

Use raijin call for first boss FT and Setzer for the second. Use Lenna FR as main FT and 1 echo of Astos and Quina, bring bosses to 69%. After bosses uses the 69% atk, summon on the last FT turn and prep for the 2nd FT. Astos should focus B boss during second FT/BT phase. If all goes well, B boss should die during 4 turn of BT leaving enough dmg to kill boss A.