I had to cheese it pretty hard to defeat the end bosses. I played as a necromancer, so I'm not sure if I wasn't playing correctly or what. I have played through as a mage before, and missed the slow down spells. :']
I wish Voytek was my brother in arms, bearing the weight of the entire army on his bear shoulders. He is the greatest bear it has ever been my privilege to control in a game based on bears with mounted weapons surgically grafted onto them.
I just fully upgraded the grenade launcher and that was all I needed to defeat the 300. They never even reached the wall. I also bought 3 fans, but I'm not sure if they did much or not.
These games are great. The only problem I had was the guardian of the 3rd shard piece--it took so long for me to beat him that I went from 180 coin to 2100. All he did was heal 2k hit points whenever I got him down to 1k or so, and I got lucky to beat him with the party I had(2 mages kept him at bay without me doing anything).
Fun game, and cute little story. :D
For some reason I lost all of my money randomly, though. I had just earned ~4,000, and got dropped to 0. Still, 5/5