What were you thinking when you created Aranthir? He kills living creatures with an unholy word, but demons can't do anything, and summoning doesn't help. The Overlord can theoretically do something, because cave dwellers can quickly kill skeletons, and cave lords can kill the avatar if Aranthir summons it, but in reality, morale and luck don't allow him to do anything. And God, why give him 22(!) Death Knights? And it's not even about the number, but about the fact that Aranthir has powerful artifacts and incredibly powerful magic. But the dumbest idea was to give these knights double attack and incorporeality, because they are impossible to kill. Decide, either they overwhelm with numbers or with quality. The only one who can do something is Sinithar, destroying everyone with an enhanced Armageddon, but he also destroys his own army, and it works against all heroes, so it doesn't count. And even then, it works equally well against all heroes, but not always against Aranthir.