Should I rank 5 my 4star Scarlet Witch (Sig 64) or Ghost Rider (Sig 20)?

Saphyaer

Thanks guys for the input. Them T4CC are so difficult to come by for an average player like me. I must say I use GR more often as I have Blade.

Namelez

Scarlett is the best mystic. There's a reason she isn't a 5 or 6*