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.
Registered: Jun 2016
Location: The Throne of the Sheevites
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.
I didn't say anything about it doubling or being massive, although it's certainly closer towards a substantial gap than a slight one. You think the Son's descent into the dark side constituted a minor amp at best? You think thirteen years of growth by one of the most powerful Force users ever is minimal?
Sidious wasn't harmed, but he was thrown backwards.
Either way, your point appears to be that Sidious' durability is significantly greater than the potency of his Lightning. If so, is it implausible to suggest that TPM Sidious could similarly withstand EoTPM Sidious' Lightning?
Registered: Jun 2016
Location: The Throne of the Sheevites
I never said you claimed so. I merely demonstrated that whether the gap between EoTPM and RotS is big or small, the former still wins against this team.
You do make fair points that I hadn't considered before, though. The gap may be larger than I had assumed. But as I said, none of that is a factor, unless you somehow prove RotS Sidious could one-shot EoTPM and in the process render the former's feats unusable for the latter. But even then, we'd still be left with scaling that puts EoTPM's power above the combined power of this team.
So I'd say discussing the gap is pretty pointless.
That wouldn't have any effect on the battle.
He probably could, tbh. For how long, though, I do not know. He'd only be delaying the inevitable, though.