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Excellent start, good economy, rapid expansion, with 3 Ogre and 1 Manticore's Lair at home, decent army.
Also, a Necromancer hero with two Summoning artifacts, a large number of skeletons, and ultimately over 2000, more than the opponent.
Quickly built a Magic Guild to get Town Portal, got the Air Amulet, then obtained most of the artifacts from the Angel Alliance, significantly increasing the hero's stats compared to the opponent.
Finally, gathered 20 Archangels and 15 Manticores to trap and kill the opponent in the city.
tfp