A good example of how vader was was in the short double edged sword. granted, he had the assistance of 6 clones but, ho took on and took out one of the emperors hands and 6 cloned dark jedi. he subdued them all before killing them at the same time with force powers alone while they were activly resisting with their own.
dark jedi and hands aren't sith lords i'll give you that but, to stretch his abilities to that many targets and have the power to b-slap them all says alot.
the fight never even makes it to a saber battle unless vader's in a "playful" mood.
as a side note, has anyone else got this month's insider? they pit maul v dooku
Spoiler!
Spoiler!
Spoiler!
Dooku wins. even with his saber skills, mauls ferocity is more than dooku can handle but, through pure force mastery, dooku defeats maul. maul was rated quite low in power and technical ratings while being very high in combat skills.