Mutli-Match in Path Format Configuration

[xeruf]

I have a bit of a special directory order - I mostly use something similar to the suggestions in the manual, but with caveats:

1. My top-level directories consist of a few genres / track types, specifically Ambient Canto Electronic Soundtracks Worship, then usually with artists as subfolders. Canto is specifically for singers (Veela, Elton John, Billie Eilish, Oh Wonder...). Is there a good way of teaching beets that structure or would it be sensible to add each of those as an own library directory and do the initial positioning manually? Does beets even support multiple library directories?
2. To come to the original question: Movie Soundtracks go into a subfolder Soundtracks/Movies/MOVIENAME but all others (usually OSTs) into Soundtracks/NAME. Similarly, compilations go into GENRE/ALBUM but if they belong to a label (The Arcadium, Liquicity, mau5trap, ...) they go into another subdirectory for the label. I think for that I would need to match on comp:true and then the existence of the label tag, something like comp,label: $genre/$label/$album/$title?
   In my tool MonsterUtilities I had a syntax ${%track% }%title% which would only add the characters inside the curly braces if any tag inside (delimited by %) was subsstituted as non-empty.
   The label issue could be solved with something like that, maybe $genre/${$label/}$album/$title?
3. Then I also have a Worship/HipHop folder specifically for hip-hop worship artists, all other worship songs also follow the GENRE/ARTIST/ALBUM standard.