The weakest castle in Heroes of Might and Magic IV!

I find it most interesting to play as Death, especially using this scheme: Necromancy - Death Magic - Demonology - Nature Magic. In my army, I always have: Vampires (non-stop resurrection after each battle), Ghosts, and Bone Dragons. I don't take other units to increase the army's mobility; after using Nature Magic, a large number of Devils and Poisonous Horrors start to be summoned in battle. And I don't even need to mention Death Chant and Death's Hand. The weakest, in my opinion, is Life, because the units are terrible, and the army's mobility is the worst (Archers, Squires, and Crusaders (or Ballistas) are slow).