Plagueis seems to be a more impressive force user based on his grandscale feats though it's certainly arguable. That said, Plagueis's comparable variety/hax, especially mediclhorian manipulation which was able to sustain Plagueis for a while vs TPM Sidious's lighting, in addition to his use of a saber give him a decisive advantage as a combatant.
__________________ "Vader's pulse and breathing were machine-regulated, so they could not quicken; but something in his chest became more electric around his meetings with the Emperor; he could not say how. A feeling of fullness, of power, of dark and demon mastery -- of secret lusts, unrestrained passion, wild submission -- all these things were in Vader's heart as he neared his Emperor. These things and more."
Plagueis sustaining himself against Sidious' lightning with midichlorians is even more impressive when you consider how drunk Plagueis was, and the fact that he wasn't even actively defending himself.
That said, I'm not totally sure whether Plagueis would win here.
Vitiate was just gonna Nathema the galaxy via a ritual, a feat that shows a nigh- unprecidented understanding and knowledge in the Force - one that exceeds, or even at the very bed rock of lowball, match, manipulating Midichlorians in fact.
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Last edited by Deronn Solo on Sep 4th, 2017 at 10:24 PM
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
But eventually he learned how to do it without external aid, as we saw when Sidious was trying to ambush him with lightning. He kept his body intact through it, while piss drunk.
__________________ “The galaxy must experience the pain of death and the rapture of rebirth as I have. I will bring chaos. It is time for war.”