Rank up advice

KG05_1

So I recently opened my third 5* and got ghost which I was pretty excited about. The question for me is is it worth it to rank up my 4* ant man even though I’ve already got a ton of solid 4*’s and I don’t have wasp yet. Is ghost good enough by herself without the synergies or should I rank up 4* ant man and pray to get wasp soon? Or should I wait to hopefully pull a 5* ant man / wasp and forego ranking up more 4* champs that I won’t use outside of the synergy team? I know I kinda rambled but if anyone has any input on what they would do it would be appreciated

Championcritic

4*s are worth at least 3/30 to use as arena fodder.