one very useful tactic I use:
At full screen, when one side has Carl, one side is Rachel, and Nirvana in middle (or near it).
Put a pumpkin out, then wind it forward,wait a sec, then IAD. It will project Rachel the perfect arc to land right on Carl, and over any doll attacks. Carl will block the pumpkin, forcing him to be grounded when Rachel arrives on the other side, and stops him from using an Anti air. Once there, begin Rachel mix up/rush down.
Another: If carl is far away, and Nirvana is in your face, if hes going to use Nirvana, do a run up 6A, 5B, IDA back wards. This is a very safe way to deal damage to Nirvana, as you hurt Nirvana while created good space. While in the air, put a sead/pumpkin/king george out. ^^
Hope this helps.