Misandra has my emblems - that should tell ya all you need to know.
But since you asked, here’s a bit more in depth…
I think she’s a near-top tier hero. Not quite Gravy/Guin/Zeline… but not far off.
The only Blues i’d level before her are Ariel and possibly Alasie - but that’s close.
She is Fast and once she fires, it’s possible for Her mana boost to bring your Average speed heroes up to ready-to-fire status on the same turn if she did a big multi hit. This talent synergizes with all heroes in the game. She’s also really solid and decently tanky when leveled so if you don’t have Aegir and are in an alliance shifting to blue tanks, she’s extremely viable.
I view her as significantly better than Thorne and would level a second Misandra over a first Thorne.
Hope this helps.