The dominators of the first Great Circle had Four States of Change: Mortal, Legendary, Rift, and finally Incarnation. A Mage also began their path to power as Mortals, before Awakening their Spirit Matrix and becoming an Acolyte, which was equal to a Legendary.
A peak Rank 3 Acolyte was equal to a peak Legendary, and when the Acolyte became a Mage, it was equal to a Dominator Ascending to the Rift State, a Rank 2 Mage was equal to an Incarnation State Dominator, and a Rank 3 Mage was equal to a peak State Incarnation Dominator.
Rowan was surprised about how much Dominators, well… dominated Mages at this early stage of power, but when he knew that this power system was equal to that of an Empyrean, he understood why that was so. Of course, this all depends on the talent and bloodline of both parties.