9 against 1? Plus six paths that each have immortal summonings and genjutsu with Itahci? Yeah until I see why Akabane wins I am going with Akasuki simply by the numbers and power with their diversity in this battle.
Akabane is so hax, it ain't even fair. His sword cut through dimensions, like the "Jigen-tou" ability of Kuwabara from Yuyu Hakusho. He can control darkness that robs all of the opponent's senses. He also has clones that has all the abilities he has. And a number of instant-death moves.