Originally posted by ybrotes_Sargon
And failed, naturally. excellentNor is it implied to work on prepared&trained!Force users instantly or otherwise. When he drained Kreia, she had to divide her attention between both Sion and Nihilus; when he drained the Exile, he had to stun her and the party.
There is a precedent with Katarr though, you're conveniently forgetting. Also, Nihilus in the finale was already in a weakened state. Feats he's performed while not similarly weakened include his TK gravity well move and planet nom, both of which are cosmic-level Force powers well beyond Vader and Dooku, and RotS Sidious but not necessarily DE Sidious. To clarify, the OP states each is at their peak. This means peak Nihilus could very much potentially eat the entire gathering before any of them can muster a defense directly against him.