Darth Subjekt
The beginning of the end.
I just said he could go all the way, but of course him losing to Luke is a definite possibility with all those other matches with no rest. but lets look...1. Mace(ROTS) - while the fight in ROTS is still viewed as debatable by some, he could have beaten Mace, but the whole thing with Anakin makes that a difficult call. We don't know when he started faking, although I do believe it was after he got kicked in the face, but by DE he's considerably stronger and would beat the shit out of Mace...
2. Bane - personally, after the other thread, I think that Bane should be before Mace, but Sidous would decimate him, orbalisks or not. He would simply outclass him. Moving a moon means jack shit in a fight.
3. Yoda(ROTS) - same as with Mace, he basically beat Yoda, thanks to a bar that magically appeared on the pod, but all-in-all, Yoda felt the need to flee. Not that I'm taking anything away from Yoda, but DE would destroy him.
4. Anakin, Obiwan(ROTS) - i don't think as a duo they're as effective as they are alone. Both did better against Dooku alone than either did as a team. I think that would definitely hinder them against someone like DE Sidious. He takes them with minimal difficulty.
5. Maul, Dooku, Vader(ESB) - this is harder for him but not by much, I think the fact that its mech Vader and Maul kinda evens it out as if it were Dooku and Anakin, but thats another point. As good as they all are, DE is just too powerful with the force and too fast with a saber. Isn't it DE Sidious where he moves it so fast you cant see the blade? How can you block that? You cant, hence him winning.
6. Vos, Sora, Asajj, GG, Durge, Jango, Boba - don't know which GG this is, but i don't think it really matters as he wouldn't be the deciding factor here. If anything, i would say Durge would be. Jango and Boba stand no chance at all, and neither does Asajj. If GG, Vos, and Sora could all attack simultaneously then that would give them a chance, but i don't think they would have the room, what with GG's 4 sabers at once. I think here he could easily do a divide and conquer. Not defeat them all easily, but just split them all up so he can take them out.
7. Exar Kun & Nihilus - being that he knows Maul intimately and how he fights with his double bladed lightsaber, i don't think Kun's would throw much of a curve at him. Nihilus i think is overrated due to his drain, and I believe, and please correct me if I'm wrong, AC said something along the lines of he cant see individual force users to drain them, like they wouldn't even peak his radar. Even if he had to focus more to see Sidious, I think he would have a lightning bolt up is ass by that time. I think overall he would progress more into force powers as he get more physically tired, and use sabers more in the beginning. He could lose here if he wasn't careful, but i think he could squeak by.
8. Ravan & Malak - to me, by far the hardest team he's fought yet. (well obviously, thats why they're number 8) Is this Jeid Revan, Darth Revan, or post Sith jedi Revan? Each as i understand it is stronger than the previous incarnation. Either way Malak is the weak link here and I doubt they're on the Star Forge, so i think he pwns him with the force rather quickly and takes his time with Revan who can hurt him pretty badly if not kill him if he's tired enough. Although I don't know how he would do it, as he's no match for him with either sabers or the force. This one is also dependant on location, and the surroundings they can each use to their advantage. Over all I say Sids escapes with his life to go on to face luke while hurt.
9. NJO Luke - obviously his toughest challenge. Not only because he the most powerful one on the list, but due also in part to his wounds and fatigue. I believe this will be more of a force war and if they both survive, move into sabers. Sidious would be hard pressed to beat Luke at this point, and being that I really didn't pay attention to the "no rest" part before, I'll change and say that Luke kills him after a drawn out battle, thanks in part to Revan who hurt sidious previously.