MASSIVE rank up decisions needed! V2 exploration rewards.

(Roster at bottom)Just finished v2. Pulled a science r5 gem. Don’t have a single r5 5*.Have rulk at r4, mostly for v2 and domino synergy. Have a she-hulk at r1 unawakened, and void at r1 unawakened. Pulled a mutant gem. Have OR unawakened at r1, x23 at r4 and colossus at r1 and Havok at r3.I have around 70 mutant stones. Apparently colossus is beyond god tier with emma and OR, but his sig ability doesn’t seem to be important, just gives prowess and more chance for armor up. I also have 2 2015 mutant 3-4 gems and 1 2-3 mutant gem so can easily take him to r4. I’m not too impressed by havok, as I have a 6* proxima, so don’t really have plans to take him to r4. OR has a synergy with rulk, void and colossus and I’ve seen gameplay of him being beyond god tier. She-hulk looks awesome but risky, and has a synergy with rulk. So yeah lots of options here. I currently have 1.8 mil gold, and the 3-4 mutant 2015 gem doesnt need gold to rank up. As this has a lot of options and champs involved, please comment to provide advice on who to upgrade. Roster: https://imgur.com/gallery/fecRRA4
Also since you are only allowed to vote for one option, comment what I should do for science if you voted for mutant, and vice-versa.