Oh my god, use the nothing but the weakest things possible on the third necromancer level and start spamming them once he uses the red moon. By the end of the match there should be enough units on the map that the minimap is just a bar of green and red XD
 "Immortal Souls: Dark Crusade"){kind=icon}
 "Cardian"){kind=icon}
 "Mitoza"){kind=icon}