I have beaten the game on Rogue+permadeath exactly once, and it was with a promethean mage. I have played dozens of games with other builds, and there's no comparison. Other mages have severe mana issues or weak aoe or no pet or a blood price. Prometheans just do sick damage and inflict burns. The dragon is a very strong pet, costs moderate mana. Early game it kills, later it is a distraction. Exploding rune completely dominates the early game, especially zoos. Two points in promethean and 0 in blood mage can clear the first few levels. The higher skills are also good. Agree?