The Demon Shogun is the last boss you will face, as he appears at wave 50. During this wave, you should stay as far away from him as you possibly can. He has the ability/strength to kill you with a single attack, and has a great deal of range. Simply stay away from him and range him/spam your "Troop Trample" and "Lethargy" powerups whenever they become available. Also keep utilizing the strategy of spamming farmer allies, as Demon Shogun is very slow and shouldn't advance too much with them being distractions. When you get pushed all the way back to your gate towards the end of his health, simply stand behind the gate and range him. Continue to spam farmer allies and call upon troop trample/lethargy to weaken him. If you die, use a revive if you own one to help you deal a lot of damage on revive and also since by the time you die you will most likely have him almost dead.