All you have to do on the last level once you reach THE END is to keep sending hobbits and golem while shooting your arrows repeatedly, and save up mana for angels and dragons...by sending your hobbits you'll stall the boss because he has to stop to fire at them and the golems can withstand a shot or two by the boss before they die so they get in some dammage.
 "Flag Football"){kind=icon}
 "Factory Balls 2"){kind=icon}
 "Epic war"){kind=icon}