Priest

Priests follow their own AI - like Sages, Adventurers, and Leaders - but they differ from these other archetypes because the actions they take are dictated less by their personalities and more by their religion. A proselytizing faith will have Priests actively attempting to convert locals to their cause, a Doomsday Cult may have priests that flagellate themselves in the streets, and a religion filled with wild spirits that live all around will have priests that attempt to be a liaison between the spirit world and the human world.

Priests have a very high drive to complete Quests that have been set by their Gods and by their own Religious organizations - in fact Priests are the only archetype that can see God-driven Quests and Campaigns, which means if a certain God opposes you it can render him powerless if you simply slaughter his active priests. Outside of fulfilling quests and the specific needs of their religion, they have basic actions to rally the faithful, hunt down heretics, spread the faith, and a few other typical "priestly" duties. Their most powerful ability is to conduct mass ceremonies to invoke Miracles from their God.

Mesoamerican cultures probably won't see any massive changes to the religious system, instead their culture will have a different way Priests function within a monarchy - we may "idealize" certain dramatic elements of Aztec religion to have blood hunts and undoubtedly we would customize ritual sacrifice elements. The religion itself would be a synthesis of Aztec and Mayan beliefs which will reincorporate their Creation Myths to add some flavour and unique functionality to their Myth events. Egypt on the other hand is a fantasy scenario of God-Kings, Divine Creatures, and Monsters - the entire focus will be on Religion in this case. Priests would be the tether by which the many divine creatures are rooted in the world and as a conduit to the realm of myth. Expect an expansion of the miracle system for lesser miracles and a more complex direct interaction between Priests, commoners, and their Gods.