Bane was the one to think up the Rule of two. Deceive the brotherhood of evil to create the thought bomb and destroy all the Sith and lots of Jedi. As far as devious, Bane wins. Got everyone to believe the Sith were extinct, brought them to power as his plan for conquest was set in motion 1000 years before Sidious. As far as force mind powers, not even his apprentice an adept at mind powers could stop Bane. Sidious weakest Dark lord of the Sith. Killed his master in his sleep.