Why? It's not like he's alot better than them. Dooku's probably the weakest out of the 4 and we all saw how close Yoda was to Dooku.
Why? Because he's superior to all three of them, he'd take out whoever he engaged in combat, hence "one at the least". Saying "Yoda would die first" calls for more of an explanation.
1. The Yoda vs. Sidious duel. Watch it, At the end he goes insane and actually fights better than he did at the beginning.
I've watched it, yet I still don't see how he "fights better" -- all he's doing is just matching the intensity level. He was not gaining strength or energy, he's exerting it.
2. He's not going to be fighting all three of them 3 on 1, it won't be any harder than his duel with Yoda since he'll only be attacking one at a time.
And neither is Yoda, so why would he die first?
and if you think other wise visit my office until then STFU
Where the hell is your office? Your parents' basement? I am not going down there.
Guys...Factors such as 'getting tired' or alliances being made are pure speculation.
How is getting tired speculation? All of these contenders are at the top of the PT era, and are somewhat close (Sidious/Yoda, Dooku/Mace), and will of course have to exert some energy to get the job done against their opponents.