Insane maybe is that the hero is new and you already have it at that level.
i don't see anything special
If that's expo, you have to remember there is a fire buff in effect for her.
Expo buff+ rune buff ( I think) + dust buff + crit
:DD Yes, but it is still nice.
I have 4* c3 and haven’t thought she was that cool. I might have to tweek her runes or something. But overall my impression is MEH