Sasuke takes this mid difference. Given the Intel, he simply kills Deva during his cool down period with Amaterasu. Aoda is summoned to stall Animal Path summons. One of them is put in Genjutsu to turn them against others. Human, Nakara, and Petra path are literally fodders and have no CQC feats at all, nor do they have any decent speed feats. Once Animal and Deva are out, Sasuke can simply speed blitz these paths and take them out.
Asura is killed with Chidori. If this strategy doesn't suffice then any path that gets near bar Petra is punched down and turned to a stain on the bridge. It's just that simple. Wrapping Enton around Susano'o would prove to be instant death for all paths bar Petra. I cannot see how Sasuke loses this.
How is he going to force Deva in to ST, and get Amaterasu in while he has 5 pains that can immediately jump him from the Amaterasu recharge rate?
Jman's 3 frogs were solo'd by the Cerebrus, Aoba is not taking on that let alone 2-3 other summons.
Pain's chakra goes in to the animal summonings, that's why they have Rinnegan eyes and black rods. Sasuke's genjutsu is not controlling them.
You're underestimating Preta, he's a key Pain among the 6th, you need to separate him to take on the other 5.
========================================================================
If Sauce gets Amaterasu off, he kills all but Deva and Preta. Those two easily jump him while he recharges from using the MS.
If Sauce gets Susano'o off, then he'll have to take out Deva so he can effectively kill every other Pain. But then Animal path can spam its summonings and overwhelm him.
If Sauce gets Susano'o off, and he goes for Animal path, then Deva still takes him out with BT and the fight ends.
========================================================================
Everything in Sasuke's arsenal is countered. If Sasuke was to stand a chance, he would have to retreat in the middle of the fight. That's not happening, they're fighting at Samurai bridge.