Originally posted by appletonia
That's the difference between definitely being prepared for an attack that you know is coming, and presumably being caught off guard by an attack (while simultaneously exerting the energy to generate that same attack), not to mention that with the orbalisks he can't defend against it in quite the same manner anyway, so it's a completely false comparison.
Well, Revan's mastery of the force is his specialty. He is particularly good with lightning and he knew and prepared himself against Vitiate's attack and like you said, being prepared for an attack is very important. It took but a moment for Vitiate to crush Revan's defenses. How much better could Bane fair against it? There isnt that much of a power gap between Revan and Bane force wise if there is any.
Vitiate's FLS managed to take out a very powerful strike team as Bane would be in danger against such team. When he focuses that aoe lighting on a single target, he can swiftly take out powerful beings like Revan.
Also, you can't defend against it with a lightsaber. If so, Revan would have done that and also the strike team tried to defend their selves with lightsabers, it didn't work.