This game is really fun, however a bit trivialzed with cleric and 3 mages. Go full quickness gear on all characters, and put points into endurance on cleric and intellect on mages. From level 20-43(my current level), I've had the first 4 attacks due to high quickness. Try to get cleric with highest quickness, and anoint your next mage, and do 3x Electrical Storm, 95% of the time, that gives enough damage to win.
I freaking love this game. Best defense game i've played. The only thing I wished it had was a way to speed it up, like onslaught2. Other than that, 5 stars!
 "Monsters' Den: Book of Dread")
 "Protector")