$if2(%albumartist%,%artist%)/%album% $if(%originalyear%,\(%originalyear%\))/
$num(%tracknumber%,2) $strip(%title%$if($gt($lenmulti(%artists%),1), \(feat. $if($gt($lenmulti(%artists%),2),$join($slice(%artists%,1,-1),', ')\, $slice(%artists%,-1,),$slice(%artists%,1,))\)))
After circling back to tweak my file naming script for MusicBrainz Picard, I finally have a pattern I’m happy with, so I’m preserving it here so this fiddling need not be repeated.