Good to have you. That would work fine. If I was writing one like that, I'd go with someone like gambit who can "charge" melee weapons and bullets. You can do whatever you want, though.

Also, in my stories there's something called "magebane". It's a sedative that also suppresses a person's powers. Against really strong people that's not enough to stop them, but for your run-of-the-mill otherkin it works fine.