My Severa is so incredibly broken now; she has Astra, Luna, Sol, Galeforce and with Armsthrift, she can use something like a single Killing Edge or Leif's Blade (<52% critical chance with those) that'll last her through probably six maps with that 68% activation rate. And with all this, enemies still foolishly flock to her on maps with their predicted 4 damage or 0% hit ratio. It's pretty sad, but at the same time fairly hilarious.
Heck, I managed to solo Infinite Regalia with her, no problem. If she ever got to low health and Sol wasn't activating for her, I gave her an Elixir (I didn't even need it) just in case.