Ideas and suggestions.

I suggest fixing the resistance set from 50 to 35%, because combined with the hero's resistance, it becomes an unreal OP that almost certainly guarantees a victory in the match. Here are 2 matches that clearly demonstrate the monstrous reduction of sp.

I am against such changes; HotA is already too magical a game, and some kind of counter to magic (one that is actually noticeable) is needed. In the late game, the mage most likely already has a strong attacking spell, which reduces the value of the hero's own army, as it can be easily wiped out by this spell.