Originally Posted by Evln
How he planned and won the Mandalorian Wars.
That would have no bearing with Nihilus. He's completely unkillable by regular methods. And no matter how good a strategist Revan is, how would he counter an enemy that wipes out thousands of people on a whim? The only way I can think of would be orbital bombardment, some other type of explosion, or droids (since they're dead to the Force), but none of those are Revan.