thing is , she SHOULDN’T be killeable in one hit.
she should have something akin to invulnerability phase every 25% hp like many bosses in games.
Funny thing is, multiple bosses in D4 have this : Andariel for example : you cannot one shot her, she’ll always hide and create those 4 pillars atleast once.
Anyway, in my opinion, even if done differently, the result is still the same :allowing her to do her things, it’s not a bad thing to have a bosses asking you to learn how to actually dodges thing instead of facerolling and cheesing it