Goodness gracious. In terms of overall strength, the factions rank as follows, regardless of anything else: Castle, Rampart, Tower, Dungeon, Barbarian, Swamp, Inferno, Necropolis. And whichever faction a player finds easiest to play with seems like the strongest to them. That's normal. The Barbarians certainly stand out with their attack skills, and the Swamp faction with their defense. It depends on the player's tactics. I think most players prefer balanced models with all skills.