The Battle Cats - Apocalypse Temple
This can be a very annoying stage. Rushing the first two Berserkorys with iCat, Octopus Cat, and dual Islands work well for bursting them down. Basically you want to kill them fast enough to lure the first Rain D and A. Bahamut rush him. Try to preemptively send Octopus Cat/iCat before you kill the Rain D. so it gets to the Berserkory on time to protect your Bahamut. Rush the base after that so you don't have to deal with the double Berserkory + Rain D. wave.
C. Cat 30
Octopus Cat 30+1
iCat 30
Manic Island 35
Island +48