combo i use doesnt work on noel, so it probably wouldnt work on carl either, but i found an alternative on noel, so it might work on carl.
5b>5c>itsuuC>dash>6C> 2b>2c >j.b>j.v>D>airdash>j.C>staff return hit>6C>tsubame>6c>3C
2b>2c is usually 5c for me, but guess it doesnt work on small chars. idk if u can fit in a j.b before the j.C.
if done right puts him in the corner, so u can do shinshin or stick super to apply some pressure on their wakeup (strategy used on anyone really...) but if you keep carl in the corner pressured, nirvana will just be colored pixels.