I used only ghouls and wait until all your power ups are off cool down full mana. Then have the forward priest and fire towers disabled to make you life easier before it start (Make sure they don't drain your mana until you begin the attack). Then the attack use all the spells then quickly disable all priest and fire tower, nothing else, the timing is tight but there should be a small group able to sneak in and beat the tower in one attack (You do have to have 1 off max cursed energy generation to do this though and if you get max energy generation it's easy) one more edit I found If you want to make your life easier and the timing less tight then you can ignore 2 of the 3 lanes so they don''t take energy to stun