Apotheoun,The Cappadocians also have a tripartite structure: essence ( which corresponds to nature), energy, and hypostasis (which corresponds to face or person).
I'm sorry, I may have confused you here. That is not what I meant by the "tripartite". By the tripartite, I meant the terms Kyana, Qnoma, and Parsopa. We only use Kyana and Qnoma in the Trinity, but we use all three in Christology. So, to correct my mistake, when I initially mentioned the "tripartite" I was thinking of Christology, while you were thinking of Trinity. I'm sorry.
When I mentioned "unlike Byzantine theology" I was referring to the Physis (Nature) and Hypostasis/Prosopon (Person) that is used, while we use Kyana (general nature), Qnoma (individuated, but not personalized nature), and Parsopa (Person). You see, we make a distinction between each of the three, we don't interchange Parsopa with Qnoma, nor Qnoma with Kyana.
And as I mentioned, based on my reading of Mar Odisho (our last great theologian before the decimation of the Church of the East), we equate three-fold energy with the Qnome in the Trinity.
The is how we would say it: Unity in God corresponds to Kyana (general essence/nature), which is common to the three divine Qnome, while distinction corresponds to the Qnome (individuated essences/natures)With the foregoing information in mind, unity in God corresponds to ousia / physis (essence / nature), which is common to the three divine hypostaseis, while distinction corresponds to hypostasis / prosopon (subsistence / face or person).
And as I mentioned, we do not confuse the Kyana with the Qnome (Sabellian), and we do not accept a two-Person Christ: "a mere man in a moral union with the Word" therefore, we are not Nestorian. But as far as Nestorius, many of us do not think that he himself was Nestorian, neither do we think that Theodore the Interpreter and Diodore of Tarsus were Nestorians. I do think that Nestorius made the mistake of speaking against the title: Mother of God, but I do not think His preferred title: Mother of Christ, is in itself heretical. The Common Christological Declaration says that both Mother of God and Mother of Christ are acceptable titles. The Assyrians have always confessed: Mother of Christ, our God and Savior.That said, I am concerned by what you have posted so far, because it appears to have affinities with the theology of Sabellius and the christology of Nestorius.