Prof x takes a little bit get used to. But if you get good with him def rank 5 and awake. Wolverine worthy of r5 and awakened if have apoc syngergy. Hit monkey is nice exp with suicides and class gem awakening (higher sig the better) and I think r5 worthy. Kilmonger used to use alot but recently sits on the bench so I would personally put him lower on the pecking order ( although with ht can build up alot easier to an insane bleed). Sasquatch also boderline r5 exp if you don't have doom, ss, or bwcv. Also depends on where u are in stage of game. If you have explored act 6 prob looking more at 6 stars and in that case only prof x and wolverine with apoc.
Wolverine still is a great damage champ but would rank up some others before him without the apoc synergy. If you have kil as a 6 prob wouldn't rank up his 5. So all that being said my rankings for 5r5/ 6r2 would be for you would be caiw (if high sig), void, cg (if not already r2) ss (great for the champ fight), prof x (awake and if you can master his attack), and hit monkey. Sunspots another great champ to r5 exp for act 6 but I feel needs to be awakened for longer fights to keep his attack rotation going.
You e showed 9 5* where is the restSeeing as you said you opened 15 featuredSo u showed 9 you still got 6 to showBut I don’t think(IMO) you should go for feature if you don’t have 40 of the stars