Durge can probably reach Revan by the time Asajj distracts him...if Revan can subdue him with lightning, then he could win...but Durge won't hesitate to use Asajj as his shield and she's a very good fighter, enough to stall Rev for a few moments at least...this could go either way, but Durge is a huge problem for most anyone
Hmmmm..... well..... isn't this difficult? 😐 Asajj and Durge would make quite a formidable team, with Durge's regeneration thing and Asajj's great skills with the lightsaber. But Asajj was pretty much toyed with by Dooku, and Durge was killed by Anakin when he threw him into a star. Revan's lightsaber skills definately outmatch Asajj's, and I'm pretty sure his Force powers were more formidable than Anakin's at the time of the Battle of Boz Pity. Revan could probably Force crush, push, and lightning Durge to death after taking care of Asajj. Revan's biggest problem in this fight would be being outflanked by Durge and Asajj, both of whom are really fast.
It wasn't exactly like Anakin could have killed Durge anyday. Durge pretty much toyed with him, until Anakin pushed back all of his grenades and mines that he had placed on the ship. Then his regenation overworked and he became weak, then Anakin forced him into an escape pod and shot him out. Revan isn't having an escape pod and is not on a space ship that is above a star, it's going to be more difficult than that.
Again, where is it said that Durge can be killed by lightning?
1. It sure didnt look like he was toying with him. He said "You've got to be the fastest Jedi I've killed. And I've killed, a LOT of Jedi." Then tosses him around and stuff.
2. Well, obviously one hit of Sith lightning can't kill Durge if when Obi-Wan zapped him with those gigantic pipes didn't kill him. However, Revan could use the same tactics as Anakin: weaken Durge's regeneration thing until he can easily be killed and is too weak to defend himself.