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1. Sabers
2. Force
3. All-out

Sidious

Sidious

1. Revan. Revan actually beat Malak in sabers. Sids lost to Mace via frontkick (LOL), and Yoda disarmed him per the script and on-screen sudden lack of having a lightsaber.

2. Revan. He can use Force diode powers on himself, which is like asexual reproduction in the Disneyverse. Sids barely kept Mace off of him with lightning and lost every single Force struggle he had with Yoda.

3. All-out, Revan pushes Sidious over his table and gives him a work-over.

A fight between Darth Sidious and Darth Revan would be a great fight, but it would be Sidious who would prevail and it wouldn't be close, but it wouldn't be easy either. However, that does not mean revan is weak, indeed the preserver had to say revan AND ONLY revan was the reason for the defeat of the Mandalorian king, I assume that turning to the Darkside would make him temporarily stronger.
But honestly I love Revan's lightsaber.

Darth Sidious, but Darth Revan makes him work for it.