I have 3 5 star mystic aw gems what should I do with them

Xreiss

I have gotten mystic gems every time I open a awakening gem crystal. Is there any way to trade them in for one of a different class? Beacuse I have no mystic champions worth awakening.

GrassKnuckles

There’s really no other option but to wait

winterthur

Hopefully, it comes again this December.