Green Arrows with Lines are where you face 4 Seed bomb towers, the Green Arrows WITHOUT lines are where you face 1 seedbomb
This requires a tower-stacking script, Do not forget the spider & Nature pylon, they are to be placed behind the stack
I used an upgrader adept for the first 3 waves, if you feel like you dont need it don't use it - You don't have to upgrade minions, if you do do it during the hero's faze -