I have been filtered by Barbara's fat damage. Hardstuck on mission 21-2 at level 54. Was going decently well until Barbara shredded my team before the warning even finished. I've gathered that she targets your backline and is immune to Tsubaki's taunt, track Hasumi could in theory kill her but her range is too short on her ex skill to reliably hit the boss right away and she can only survive one burst of minigun fire, a second kills her every time. Everyone is in T4 gear but its looking like I'm going to need to farm my ass off to get some higher level stuff and levels.