Originally posted by SunRazer
Based on what is he only slightly behind RotS? The Complete Visual Dictionary implies that Sidious grew in strength constantly, and by TPM he obviously hadn't reached or even approached his full potential, so whilst he may have had diminishing returns from TPM-RotS, he would've still been growing.Add to that a couple of events along the way like the Son's descent into the dark side, which the Father claimed would grant the Sith increased strength. We know Sidious also conducted numerous rituals between TPM and RotS, and I think it's likely that he used at least some of them to increase his strength.
Well, there's nothing concrete proving it was slight. However, there's no reason to assume it was massive, either. All we have is several unknown power increases which you just listed. But even if we are being generous and assume his strength doubled in the years leading up to RotS (which is unlikely, although it would be a welcome revelation to further the Sidious wank), he'd still beat this team as of EoTPM.
RotS Sidious tanked a blast twice as powerful as his own Force lightning without any damage whatsoever. Even if EoTPM Sidious were only half of RotS' power, it would still mean he could tank a blast half as powerful as the one RotS tanked with no issue at all. The potency of that blast halved is the same as RotS Sidious' lightning, so based on that, EoTPM Sidious can tank RotS Sidious' lightning without a dent.
EoTPM is far more powerful than either of the team here, based on the reasons I already gave. If we assume RotS to be twice as powerful as EoTPM, that would make him over four times more powerful than either member of the team, and the lightning he can summon would be similarly more powerful.
So, in short, EoTPM Sidious can tank attacks over four times more powerful than either member of the team can conjure. And that's assuming the gap between EoTPM and RotS is as big as it was here, of which there is no proof of. Either way, the team cannot win a Force battle.