So, I set up a springboard and some lasers. Somehow I've got a turtle shell stuck in a perpetual bounce earning me money, but it won't stop. It just keeps going.
A good strategy is to use just spearman and change lanes every summon. Just go down the line, and back up. It's extremely adaptive, and the computer doesn't seem to defend against that very well letting many of your spearman past. It worked for me against an 89% difficulty battle.
The "One Lane" strategy is flawed. If/when your opponent crushes your line with beefed up swordsman, flails, royal guard or whatever, he gets a charge from killing so many dudes at once.
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