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:
– On the Unity of Christ by St. Cyril of Alexandria
– 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