When you're in the comeback (crab) stance, you can extend the leg you are attacking with, in order to strike quickly, or launch from your comeback stance, with a leg/knee ready and strike a turn or two later.
When you're attacking from the comeback stance, treat it as a directed comeback, focusing all the possible power in one direction, for one purpose. Just make sure you don't dq if you're close to the ground.
Tutorial:
http://forum.toribash.com/showthread.php?t=358620
Replay (attached):