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.
o/ eh,eh,eh I, ...I,...I, gotz a question..... what if i cant achieve crabstance in less than 100-150 frames and want to be chasing after an oponent more quickly =3