The final boss is fairly easy if you have everything maxed out. Just make sure that you are constantly making more hobbits. Your finger should be like rapidfire on the "1". The hobbits are killed almost instantly. obviously, but "The End" stops moving closer to your castle while he's attacking the hobbits, so it buys you more time to kill him. Aside from the hobbits, just hold down ASDF and make a crapload of angels, don't worry about the other 5 units, they don't really do much to him.
 "Take Something Literally"){kind=icon}
 "Achievement Unlocked"){kind=icon}
 "Epic war"){kind=icon}