User blog comment:B214/Question and Answers 6/@comment-26293136-20161107123620/@comment-9595671-20161107154328

We only know for sure she can't use both of his Balance Breakers at the same time, using both gears in general is hard to know since it's never been mentioned he's using a devil and holy sword at the same time that's not his holy devil sword.

Unlike Xenovia, Kiba seems to be better at one-handed swordsmanship so we'll likely never see it from him, but who knows, maybe in the current arc we'll finally get another two SG wielder to show us.