I found a way to create a LogicPro project template which can host all 768 midi tracks feeding into a single VePro7 instance (using AU3). It does involve some simple enviornment cabling. Read more about it here, and a 1536 track tempalte is provided to get started.
https://www.logicprohelp.com/forum/viewtopic.php?f=9&t=143416#p763950
Let me know here or on the other thread if you ahve any quesitons, the entire thread quoted above is interesting fora anyone trying to make larger LogicPro templates with VePro7