The combination of number 9 and 10 would be pretty beneficial in so many ways. Could be extremely well prepared for everything since you would never have to waste real time sleeping, and you could always see what if by saving before making a decision. Want to know if you had done something different with that girl that got away? Save, smack a ho in the face with your dick, find out that was the right answer all along to get her to like you, thus discovering she's a crazy bitch, fuck her brains out, revert save, go on with your life without wandering forever wtf. Obviously there are limits to the save since you have to get back to your room to revert save, so no jumping off a bridge for shits and giggles, or going GTA for a day unless you are sure you can get back to the save point before someone puts a bullet through your cranium. I would second number 7, reroll as an immortal elf, and then combine it with something else fun like number 6 or something. I'd go with number 9 and 10 because you could always just revert save and do it all different if you wanted and you could just opt to not revert once you were done messing around and so sick of the Time loop, you didn't want to do it anymore.
As for picking a super power... I'd go with some kind of regeneration, ala Wolverine. Extended life, don't have to worry about getting sick, do all the crazy dangerous shit I'd never do just because, fuck I'll heal. Get some good times out that. Especially if you went with the on crack regeneration from the movies, where you can literally have your body being torn to shreds and just *bloop* you're good again, no worries. Could put that to a lot of use, good or bad. Or take it to Claire Bennett level even.