easy way to beat it without even having upgrades: Use bomb towers, upgrade them to radiation towers. eventually get 3 defense towers, one for each "section" around your base, and then just keep getting more radiation towers and upgrading your bomb towers. I lost one or two towers at the beginning, and didn't struggle at all with later levels with this strategy. + to keep alive if you wanna beat this game easily
12,000 pts on my final throw. why didn't they just give me all the upgrades for one round, so I could pay them back right afterward with all dat star cash
hahaha. I made the king a tank. I just gave most of the points to him (except for x2 skills for others, and chivalry for the knight for extra heals) and he beasted that boss. pretty much soloed him with Kiiiing Punch!