@wowfucktron
I don't know the meta but from the skill description, max damage should be attainable from perfect counter (the frame thingy) or 2 hit tanked with shield. (unless there is some additionnal damage on the perfect counter i'm not aware of)
Beidou has the highest theoretical damage output in the game but it relies on Korean Starcraft player level reflexes
it's just about releasing the elemental skill the moment she get hit (if you're bad just wait you get hit a second time)