4* Mutant rank up question
I already have x23 as a 4* 5/50 and I have a duped AA sitting at 4/40 and I was planning on taking him to 5/50 next. But I recenlty duped my wolverine and know his regen is way better than x23 although he doesn't deal the same kind of damage as her. Also I'm in the transition phase where 4/40s aren't as useable anymore (as I'm taking my 5th&6th 4* to r5 very soon) but T4CC are still hard to come by. I only use 4/40s sometimes in aq map3 if I need my 5/50s and 3/45 for aw/questing. For context I'm 190k rating with 1 3/45 and 4 5/50s and I have 8 5*s in total.
I'm really torn because I know AA is the better champ but wolvie's regen could save me so many items. So my question is who should I rank5? And if I rank 5 my AA (which I think is the better choice) is it still worth it to r4 wolvie? Keep in mind that if I rank 5 one champ it takes me a good 3-6 months to get another 3 mutant T4CC(depending on rng).
Although this all won't be relevant anymore if I pull the goddess Domino from my featured 5* next week 😉