Agatha

Try to get Agatha out of your hand on turn 3 or 4 (with wave or lady Sif) , maybe bring her back with a Ghostrider, and pilot the rest of the game yourself with a Shuri-Redskull combo. If you don't have Wave or Lady Sif in turn 3, just retreat. (You will always have a 66% chance to get wave or Lady Sif)