Max damage CB combos by weight:
Featherweight CB:
4P+K, K, 6KP, P2KP (I think. I haven't looked into this one too extensively tbh.)
Superlight CB:
4P+K, K, 6KP, 2KP
7K, BT P6PP, 4P2KP
Light CB:
7K, BT P6PP, 4P2KP
Mid, Cruiser, & Heavy CB:
2P+K, BT P6PP, P2KP
Superheavy CB:
7K...