So I have just one complaint and I'm not sure where to put this but the hero engineers are just insanely overpowered. Their flame throwers to entirely too much damage...I was looking around for better ways to take them out and there just isn't any. Was just playing a few minutes ago and 2 lvl 3 engineers wiped 3 groups of lvl 3 minions with armor and weapon upgrades...a little unbalanced imo