Pretty sure the Sun Crusher wasn't destroyed by a ''Rebel Offensive", but by Kyp Durron who redeemed himself by charting it into a black hole in the Maw, which is where all of these super weapons were designed, by isolated scientists who were extremely intelligent.
No but Luke destroyed a death star without even relying on force powers to do it. It doesn't matter. Kyp can move the sun crusher with the force alone and Luke is far more powerful than Kyp. There's just too much Luke feats for Revan to keep up. Too much that Luke has done that trumps everything Revan has.