Best skilled creature.

Weavers are good when they have someone to protect them. They are team players, so to speak. But celestial warriors can also handle things on their own. An example is in the screenshot. 14 units defeated an enemy hero's army without losing a single one of their own.

The last mission for Anton, with the liberation of Gwendolyn and the killing of Arriban. There, I foolishly decided to get the achievement "don't lose a single unit." And I succeeded. The "Healing" spell and the fourth level of the racial ability (thanks to the artifact) helped.