no knowledge on either side, NO EDO TENSEI who takes this?
Let me seeeee.....
Kabuto. How? well Shinra tensei would work the 1st time, but then Kabuto will calculate and figure out a way around it. Not that hard to.
Pain summons? Ha, Kabuto can Summon Manda 2. They will be like flies compared to him, easily crushed.
Soul takers? Well, they'd have to get close enough to catch Kabuto, Kabuto is already ridiculously faster than pain. close range is a no-no VS Kabuto sage mode.
Asura path, may be trouble. But Manda will solve the issue, if not that, then Kabuto can sever him in half like he did itachi. Kabuto will figure out their shared field of vision, and will blind them all, or put them in genjutsu.
Chibaku Tensei? okay...and then what? kabuto can liquify so he isnt crushed. pain can hold it there for as long as he wants
actually the only difficult one would be God Realm, Kabuto easily defeats any close range fighters due to his sage ability. Animal real gets easily dealt with by Manda, Naraka path can stay as far away as he wants, but the ability to control the environment, he can trap naraka and swallow him whole. Kabutos amazing speed and reflexes give him the edge in this fight. Manda 2 size makes a huge different, makes any other summon creature seem like nothing compared to him, much larger than konoha, so i dont see how pain is going to defeat Manda 2 alone, haha