>>2344680985+ speed is all thats required so it doesn't get outsped by sanic MEvos at +1, but i think the bare minimum should be 81.
Fire/Ice is in a unique position, in that it can benefit from most of the offensive abilities moreso than other types. It benefits from 2 weathers directly, has several high power moves that have side effects, Refrigerate, priority, contact moves, Freeze Dry, etc. So if we do get one thats a strong pokemon then it would be hard to go wrong.