Well, I don't think Necromancer is stupid either; he won't control those who will be eliminated on the next turn, and 2 stacks of Knights represent a significant weakening of Haven. The same applies to Archangels and Seraphs – you can first eliminate the Archangels and then the Seraphs, and there is magic resistance against the God-Blessed. Zealots with Armored Lancers look good, but only if there is a teleport. And in general, if you deal with cavalry here, no Zealots with Armored Lancers will help.