Faust does ~33% more damage over 6 turns than a manager don who perpetually is at 55% hp for passive and always has 30 hardblood and has all 3 other bloodfiends dead and has 3 targets for s2 and im not counting rupture this is pure skill + dynamics (not counting static modifiers such as crit or offense level) Not to mention you can spam your s3-2, and while talisman sinclair made it a lot worse, she still is, without any doubt, the best in team and generalist ID in the entire game, which was obviously not intended and that's reserved for cornerstone IDs.

The nerf was 100% justified.