first – https://blogs.ancientfaith.com/orthodoxyandheterodoxy/2016/04/12/chalcedonian-orthodoxy-non-chalcedonian-heterodoxy/ – read this, then all 104 comments

second – https://blogs.ancientfaith.com/orthodoxyandheterodoxy/2016/04/14/response-nicholas-marinides-non-chalcedonian-christology/ – read this, then all 15 comments

third – https://blogs.ancientfaith.com/orthodoxyandheterodoxy/2016/04/15/follow-nicholas-marinides-non-chalcedonian-christology/ – read this, then all 81 comments. The comments here are especially illuminating to the fact that “reunion” is impossible, and both groups do in fact have different Christologies

fourth – https://www.patheos.com/blogs/henrykarlson/2017/10/jesus-christ-god-son-without-human-person/

fifth – https://en.wikipedia.org/wiki/Council_of_Shirakavan

sixth – https://en.wikipedia.org/wiki/Council_of_Hromkla

seventh – https://www.youtube.com/watch?v=9pxXj6I8Eds&t=4231s&ab_channel=AncientFaith

and then these:
–Byzantine Theology: Historical Trends & Doctrinal Themes by Fr. John Meyendorff
– On the Unity of Christ by St. Cyril of Alexandria
–On the Orthodox Faith by St. John of Damascus
–Christological Letters by St. Maximus the Confessor
–Free Choice in St. Maximus the Confessor by Joseph P. Farrell
–Disputations With Pyrrhus of our Father Among the Saints Maximus the Confessor translated by Joseph P. Farrell