Actually, Cervy 33B is safe.
But anyways, Cervy can be a bit annoying, but I don't think its really that terrible for Maxi. His aB can beat everything after 1B, so don't use that much if the Cervy knows whats up. He can't really do anything special to mess with 44B, so you can still use that like normal. Make sure that you be careful about your spacing with 4BB on block, and discourage aBing after LO B with occasional LO BKs. Other than that, just watch his backstep. If he gets too backstep crazy, let him have some 66As and 66Bs till he calms down with the stepping.
Lets see, what else.... Punishment:
-1AB is B+K punishable ( or 3B if you cant hit the JF).
-3B is AA punishable if in range
-3A+B is 6A+B punishable
- !GDR is B+K or backthrow punishable
- if they throw 22AA and it hits NH, block second hit and punish with 2B.
-aB should be punished with 6A+B (BE), CE, or 4BB