The debate here isn't to argue canon itself, but to argue that in hypothetical versus matches (especially those including EU characters) using absolute statements from GL on "most powerful of all Sith/Jedi" is inadmissable outside of movie-only continuity.
Case in point: Chee and Ush's rules both indicate that GL is absolute and EU must confor, to his vision. Proof of this is the rare times GL has negated or ignored EU when making the prequels. The problem is that this argues those rare exceptions as proof of adherence to GL's will. Yet all EU which comes before and after the movies can be called outside of GL's intentions. By his own admission, nothing postRotJ should exist, but in the separate universe of EU Lucas has NOT seen fit to obliterate from the official LFL timeline.
This means GL implicitly sanctions the existance of EU that may not jive with his intent. He has disavowed arbiting its growth. He has made very very limited restrictions on its lore and development. Therefore it is completely illogical to use blanket statements from him as absolutely binding outsiden of movie-only continuity since that is "his world".
On Alderaan, Malgus was beaten by then a Jedi Knight Satele Shan. If Malgus faced him [Revan] at the height of his power, he would lose. Wasn't it Traya who said that "looking at Revan was like staring into the heart of the Force." Bane recorded powers that Revan wielded that Bane even he stated wouldn't try.
Revan returned to Korriban and crushed what remained of the Sith forces. He was both a Sith Lord and a Jedi Master at one point in his lifetime. Few have achieved that. And opened himself to the Force and survived.
He may have gone Starkiller and possibly "survived" like he did. I believe we'll see more of Revan in future novels. Who knows maybe Starkiller maybe related to Revan and that is why he is so powerful.
__________________ "Great men are forged in fire. It is the privilege of lesser men to light the flame . . . whatever the cost"
No it doesn't. Malgus also dispatches you after some other tasks. Things he could likely easily defeat. Now if we want to go with "hints" how about the fact that Malgus is a "last boss" while Revan is only halfway through the game.
Malgus sends you to do stuff because he's part of the Quest Giver's Union. The QGU opposes any of their members actually taking care of their own shit.
Also, Malgus doesn't back down from a fight unless he knows he can't win it. And even then, he still says "**** it". I haven't seen the quest related dialogue for this scenario, but if Malgus were to avoid confronting Revan when he had the chance, it would genuinely surprise me. If anything, Malgus seems to be the type who would want to curbstomp Revan to add to his prestige and develop.
Ares' point is well made, though, unless all the tasks Malgus assigns are those beyond his ability to deal with personally. Otherwise, one could argue that given Count Dooku's reluctance to battle Darth Sidious without aid is an indicator of his inferiority.
Starkiller is dead, but Revan may actually be alive. When Starkiller exploded with the force it was quite different, there was a body left. Revan leaves no trace.