From what I've seen of DE Luke so far (yet to read the swarm war) I havn't been too shocked so far by what he can do (gave up/catching up on the NJO Luke here to) with the force.
Blocking blasts from AT ATs and capital ships, collapsing war machines with a gesture, flying the millenium falcon with the force, smacking aside force lightning with his bare hands...
...Luke managed to land a crashing Imperial Star Destroyer on Coruscant by manipulating the repulsors through the Force.
During the time when he was re-creating the Jedi Order and was searching for potential candidates, he walked on lava, believing in his mastery in the Force. One should note that the temperature near a lava lake is so extreme (around 2000 degree F), it is almost impossible to even breathe properly. Not only did Luke use the Force to walk on lava, but he also battled a creature living in lava at the same time.
Luke used the Force to crush the rebuilt fortress of Darth Vader to nothingness.
__________________ http://darthglentract.tripod.com/index.html Go Jawa's!!