Golly, for someone who apparently hasn’t been using AE for that long I did get it to work the way I described with proper use of expressions track mattes and precomping. No copies anywhere and everything cascades.
Next time you decide to reply to someone who seems to be an utter noob, realize that you started somewhere as well, just as I did several years ago. Sometimes people like me just have a brainfart and can’t figure it out even with several years of experience. Thanks for nothing.