The strongest castle in Heroes of Might and Magic IV.

Well, ascending to the heavens won't work against a Barbarian :) But my assessment is slightly different: 1. Nature 2. Life 3. Haven 4. Chaos 5. Stronghold 6. Necropolis I chose Life for 2nd place because it has GUARDIANS and strong blessings. Haven has its own guardians and spells to remove hypnosis, berserk, etc. Nature is inferior due to summoning and a very powerful spell, such as Dragon Strength.