Next idea after folderify could be creating a serial sidechaining among those folderified tracks. Highest folder would be highest master, controling the folder below it (pushing it away), next doing same for their children, and so on. Depending on which track you put your audio, you can select its hierarchy in sidechaining masterness.
Folderify is here:
https://forum.cockos.com/showthread.php?t=213883