Heroes: When on Defense

Heroes should use their ability automatically when they get down to 10% life in defense mode. Or that life-threshold to trigger the ability should be something that we can tweak. For instance we can have a scale to choose when we would like our Heroes to use their abilities while on defense on a scale of 99% life left to 1% life left. Then when the Heroes are defending the village, they will automatically use their abilities and summon their troops, etc. when their life hit's that triggered percentage of life left.

An attacker's hero abilities are basically the only thing which offers them a real advantage in high-level raids. Introducing an ability for defending heroes to activate abilities is going to completely unbalance clash.