I found unionfs which looks extreamly hopfully
Lets u mount multiple directories with differant filesystems into a single virtual filesystem which u mount to a directory
mount -t unionfs -o dirs=/directory1:/directory2 none /mnt/combinationfolder
Apprently combines matching subdirectories and only shows files from the first listed dir in mount command if there are dups!
Doing some testing atm, anyone else used it?