Wolfgang smiths -Vertical causality...John Vervaeke's transcendent naturalism...Other than that for the history of Platonism and Christianity and their connection I would say Pierre Grimes has a couple great videos outlining it about the false dual revelation theory and pseudo-Dionysius etc and how we figured out that Christianity is part of the Helenic tradition and not Judiasm. As far as the ontology and metaphysics of the Platonic(neo included) tradition itself I couldn't even begin to do that in this format. I would say reading Plato, Plotinus, and Proclus are the 3 necessary.