One of the most unbalanced Ateliers?

[Kana]

Bosses and elites just get 1 shot after friend actioning a 999 quality item which you can make pretty early

[Washing Machine]

That's every Atelier.

Early games on hard difficulties are the hardest part, but soon as you get to make one half decent item, you win the game and eventually just take 0damage from everything while regenerating to full every nanosecond of combat.