A customer wants to remove the permissions inheritance from a tree of folders, but he wants to have a sort of "admin directory" group of users who can do everything in all the sub-directories.
In this way he don't have to insert the "admin directory" group in each sub-directory (it's necessary because he removed the permissions inheritance for all the folders).
So I'd recommend the same: Get a rule on the root of your subtree that will dynamically remove the permission inheritance and add your custom group as coordinator.