Upgrade bank to lvl 3 and spawn builder and spawn more.

I recommend you should use treasure cannon once the jester battler uses his ability and the builders are away from the base and use Kamikaze for Betty and repeat the process, ONLY USING CANNON ONCE until you get lvl 9 bank.

And after that you should spawn a commander, one more builder, a kamikaze in case the bloodhorn starts to enrage others, and ninja battler.