The sannin win this without PS. With PS sasuke wins. Anything else is manga fabrication. Jiraiya's fire sealing scroll is all that's needed if amaterasu hits him or tsunade. Jiraiya simply gets rid of amaterasu and tsunade proceeds to heal him up.
1 Fire Sealing Scroll against a guy who can literally spam large amounts of Amaterasu via Enton with no drawbacks? I hope you aren't serious. That'll only save him once, and that's assuming he isn't the on fire while doing it.
With orochimaru's immortality, Toad SM's increased durability, and Tsunade's Byakugo, Amaterasu/enton isn't killing anyone fast enough that they can't simply get rid of the flames.
-SM durability isn't prolonging Amaterasu's burning by any significant amount of time, not when they still get pierced by chakra rods, nor can Jiraiya remove it more than once since he only has 1 Fire Sealing Scroll (Feats) and its not re usable.
-Byakugo offers healing, and would work if they could continuously remove the flames, but they can't so she'll die eventually.
Oro is the only one who can remove the flames without fail due to Oral Rebirth, but he definitely isn't going to beat Sasuke once the other two have fallen, nor is he going to survive with Oral Rebirth alone when a touch from an Enton Weapon is enough to force him to use it, and he can spam now.
Sasuke's useless genjutsu is useless. I'm sure this isn't really debatable... The guy's not itachi.
AGreed.
Enton is powerful, but on it's own, it's not getting the job done.
With Susanoo it definitely is.
Base abilities (taijutsu/kenjutsu/chidori) are all borderline suicide to attempt on the 3 sannin.
Agreed.
The only thing Sasuke's fighting with in this fight is susano'o and it's vast arsenal. Orochimaru and jiraiya can simply restrain it with oro's shadow sleeve snakes and swamp of the underworld. Tsunade then proceeds to bust susano'o apart like she did with madara's. Sasuke's now sitting in the air with Boss snakes, toads and katsuya all at the ready. MA and PA proceed to use Frog song (not the genjutsu) thus paralysing him through the sheer supersonic vibrato waves. Orochimaru uses this opportunity to lunge kusanagi through his heart.
Now this must be the joke part of your post right here.
-lol if you think Shadow Sleeve Snakes are going to restrain a level 3 or 4 Susanoo, not when he can just burn it up, cut them down as they come to restrain the Susanoo, or simply break free.
-Mud gets hard as it heats up, and what can Sasuke use without drawbacks? Oh wait, Amaterasu. He simply heats up the area he is stuck in, hardens it, and jumps free with legged Susanoo.
-lol. Tsunade needed help to break Madara's weakest Susanoo and has never put a scratch in any of his higher leveled Susanoo. Susanoo tanks her punch with no difficulty whatsoever and retaliates with Enton Blade to bisect and light her on fire, or it simply stabs her and lights her on fire.
-Frog Song is only going to paralyze him, Susanoo won't drop so Kusanagi gets tanked by it.