Dr. Farrell makes the case for person before nature in his book, God, History and Dialectic which was somewhat digested on the blog, Energetic Procession. Both sources ground this “ordo theologiae” in the eastern patristic witness. In my less read opinion, the order person – activities- nature is implied if not directly stated in these fathers just as the opposite order is implied in the west, starting with Augustine.

If someone wants to look these up as a beginning to their study, just google “ordo theologiae”.