Simply EQ on the guitars, although in retrospect the guitars are the weakest link in mine. I cut them up too much and they sound a bit thin and buzzy as a result. In context of the whole mix they're not too shabby, but solo... whoo... no good.
But yeah EQ alone on the guitars should get you there. Maybe some heavy multiband comp for the midbass (assuming you've rolled off the sub bass), and a little overall comp for tightening up. It's mainly knowing what frequency ranges to target.