Mainly from the Pumped Guide -
Pumped Up's Ground QUAKE (Ex version) can be done for guaranteed unscaled damage after:
f212
Projectile that anti-airs (quite easy, best option/setup most likely)
d2 that anti-airs
bf4 that anti airs
Downward superman punch
b121
3,f4 (midscreen)
This only adds 13% unscaled combo damage, so use it as the situation calls. In my experiences so far, I could always use the meter for something else that's better (exsuperman punch for combos+armor and breakers of course)
But if you get a life lead, zone away and EXgroundpound for the kill.