It seems people generally rank RotJ Vader > Muur > 19BBY Vader, but even then, there's quite a gap in between the two Vader's. If anyone could justify a precise ranking for Muur in terms of Force power/mastery, that'd be great.
Pretty sure he's more powerful than Vader. All we really have is his powerful lightning that overwhelmed Krayt and his declaration that he's killed sith much more powerful than Krayt.
__________________ ''It is necessary that I should die for my people; but my spirit will rise from the grave and the world will know that I was right." The Almighty Führer
That's just what came to me at the top of my head. He's obviously in the same class as Pall and he was a rival of Drepya who was an absolute beast in the showings in the Lost Tribe comics.
He was also more powerful than Krayt, which puts him above Vader as well. Also, being more powerful than an inferior version that "beat" Obiwan with a lightsaber is completely irrelevant, since we're not discussing lightsaber superiority, but force.
And Vader beat ANH, post-prime Kenobi only after 19 years of massive improvement. I believe it was clear cut Mustafar Lord Vader and, by extention, Kenobi are greater than 19 BBY Vader.
Yet this is a force discussion since Muur has precisely zero showings of lightsaber proficiency aside from a single scan. You decided to bring in sabers as a distraction whether accidentally or intentionally.
The thing is, the more you downplay 19BBY Vader, the more Muur... doesn't get downplayed?
The beauty of that one scan is that it's not just about Muur's power being greater than Vader's, but also that his power, combined with Vader's, could've overthrown the Emperor. The less powerful you make Vader out to be, the more Muur will be compensating for that, lol.
Still not sure where he ranks to later iterations of Vader, though.
That's the general idea. I honestly don't think there's much force disparity between Vong Krayt and Reborn Krayt. He just lacks the weaknesses Vong Krayt had. If there was any increase, it was in "force clarity".
Well, Krayt claims that his powers were multiplied. Then again, Muur claims that Vong Krayt was a mere zygote compared to him. I guess Vong Krayt's not a very high benchmark, huh?
What he said clearly wasn't the case, though, as with his "I've easily slain Sith far more powerful than you!" comment, so it's worthless anyway.
I recall Lord Paladius claiming that stronger Sith than Nox had attempted to take over his cult before, and that he had bested them every time. He said this after the cheap-shot Sever Force. When he still lost to Nox, he's amazed and says something to the effect of Nox being far more powerful than anybody he ever knew. So it's probably something like that.