the avenger skill works more brutally.
By the way, elves can wipe out a decent chunk of an army in the first turn of a battle, which is also a plus.
And if a Knight trains monks, for example, they can be made blood enemies, which makes it less scary.
On large maps with undead, only demons with their summoning ability can compete in terms of troop numbers.
But runes are awesome :) especially with resurrection...