Probably Yondu, I don't know who's still doing MCOC vids on YouTube aside from Seatin and Joel Line (who to me is new) but they should have some info on Yondu I think.
Do act 4 and get that awakening gem and use it on Wolvie then rank him up or just rank him up now, he's still super solid unduped. Its a long grind but since it got nerfed act 4 is child's play even with 3/30s so if you have the time and patience for the grind awakened wolverines is leagues beyond any of your current rank up options
Wolverine would save you a lot of potions or revives in AQ. I'd lean towards him because chances are he will help you progress in getting more t4b to rank up some of your other champs.
Comments
Was about to say the same
Yep
If you need a beast of a attacker, then take Wolv