The Battle Cats - Caliban's Keeper
Why is there an R. Ost level in like every subchapter now...
This level is all about endurance so make sure to watch your cash spending. Stall the first R. Ost and peons in order to get a decent sized wallet. Henry and another R. Ost appear when the base is it. I brought along Lil Eraser due to his freeze immunity. Constantly continue to meatshield and send out attackers to deal with R. Ost. After a while, a second R. Ost will appear and make things worse. Kill the first R. Ost as soon as possible and repeat the strategy on the second. By now, Henry is probably hitting the base but it doesn't matter since his damage is extremely low. Just avoid spawning an attacker when Henry is about to attack. Once both R. Ost are dead, send out Bahamut to finish off Henry.
~Note~
Li'l King Dragon is better than Li'l Macho. If you have him, use him. I didn't because I can't beat his awakened level because I suck.
Basics are Lv20+70
Manics are Lv40
Specials are Lv30
Li'l Eraser - Lv40+14
Li'l Macho - Lv30+12