I played without using the Dungeon faction. 240 archers with Alex can one-shot everyone up close, even through their defense. Alaron kills everyone with a single Divine Intervention. Cyrus with the Ring of the Broken Soul, Staff of the Underworld, and Cloak of Shadows – the demons simply couldn't approach (they forgot to give them regeneration).

(342 days to complete the campaign with a hero who collected all the upgrades)

P.S. In the original game, the composite artifacts couldn't be bought or found randomly (from utopias, etc.).