Completed the game with this hero in 146 days (could have been faster, but I wasn't aiming for a record). The map is very good. The strategy was: level up in Darkness + Sorcery + Empathy + Vampirism + Subjugation. Troops in the final battle: all native to the castle (except peasants) + phoenixes. While the enemy is attacking with powerful units, we apply Vampirism to the vindicators + Subjugation to the shamans. In the end, all my units died except for the vindicators (they all survived).