I didn't even read the comments and beat the end on the first try. I just sent out a variety of Angels, dragons, golems and hobbits. Arrows are very important, and if it gets near your tower, make sure each of your special arrows hit it right. You need angels and golems to stop it's foward movement, and hobbits help if your mana get's low. Having maxed out stats help.
 "Epic war"){kind=icon}