Rain of stones, and gifts from the sky

[Twan]

I am sure RoS is not armor negating.

In a recent game I've used army of gold + 3x rain of stones without fog warriors, and lost 0 mage / 40+, when my opponent lost all he had.

If your wounded mages were the rain of stones casters, and you used the spell with just one gem (= 100 fatigue), it may explain the huge critical dammages.