I agree about not picking up Edo Minato at this point. He's pretty useless at 3* unless you wanna use him for ninja exams, and by the time you get him to 4* his reign at the top of the meta will be in decline.

If I were you, I think I'd try to finish GNW Madara, not Rinnesasuke. Sasuke's frags seem to be more easily available every week and you can pretty much piece him. I use BT Sasuke a lot but he can be very...situational. Like, you need a lot of chakra, you need to make him immune, etc. BT GNW Madara, I think, has more potential overall. He is a great support for any Akatsuki ninjas but you could also use him as an attack unit. Sasuke does not have the same kind of utility. If you get BT Shark Kisame in the future, you could pair him with either Sasuke or Madara.