Hero on defense!

Heroes can be a headache when they are guarding their territory but what I've noticed is that they never use their abilities while defending.
I don't know if that's for game balancing but I think that the heroes should be able to use their abilities when they have less than 100 health.

Would need major rebalancing, makes defense pretty OP. Plus it needs something to make it not too spontaneous and unexpected for the attacker.

The problems with heroes using their abilities on defence are many..
First, the heroes would regenerate their hitpoints which would make them last longer and possibly ruin much more attacks.
Second, the special effect of each royal are very powerful. An invisible defending hero with that kind of damage would make life a lot harder for the attacker, same for a raging barbarian king.
Third and last, the troops they spawn.. Imagine having to deal with all those archers and barbarians, additionally to the CC troops. This would mainly create a second CC containing these small troops, which might actually be too OP for a GoWiPe attack where the pekkas would have to deal with those Tier 1 troops one by one.

Such a change to the heroes would mainly make people take Freeze Spells to deal with the defending heroes, just so they won't get to activate their abilities.