Which 5* to rank 4?

Looking to rank 4 my next 5* champ. Existing R4 champs are CAIW, Stark Spidey, Domino and Killmonger. Who should be next?

Comments

If you have to, Colossus. If not, just wait. Colossus is good, but he does get a lot of benefit from the awakened ability

There is no rush but my 5* luck recently has been pretty dire

Colossus is trash without the dupe and atleast 70 levels