When playing as Rook, I would often Pull up a tower of light. the porblem is that my towers would kind of loose health and die randomly, sometinmes a weak enemy would attack it with full health, then it would suddenly die. I'm not sure what it was, though I get the idea it has something to do with the fact that when I was attacking the enemy base, I pulled out of the attack to head back for some potions, and suddenly my health started dropping drastically fast, and it happened a few times, always when I was at the edge of the middle pathway into the dark sides base, (even after The towers of light there were destroyed).