I always play on 200%.

Ok, I finished 3 games, keep improving my commander/hero stats and never recruit any creature. At the end of the battles, enemy commander stats are much weaker than mines. Of course, he recruits a lot, but when you have endless retal/fire shield/no retal/attack twice, nothing can hurt you much. + my fire ball did 300 damage

I like it :D

The 3rd game I lost, commander bonuses were almost never offered to a cleric hero. Maybe just bad luck.