I will list some ways that I think may be helpfull to you:
1. as vally said automation Items can be very handy for copy pasting points
2 Using Smart copy (Ctrl shift C ) and ctrl v. The difference between a normal copy (ctrl c ) is that the normal copy the points where smart copy the time selection area. The when pasting will be easier to sync.
3 Using an temporary item (MIDI ITEM or an empty item) with envelope points follow media items ON.
https://imgur.com/2Bk4Bt3
For some reason it uploaded as mp4
4 X-raym scripts for copy/paste envelopes
https://forum.cockos.com/showthread....98#post1499998