Discussion on IRC [1] has indicated that the 'instrumentator' AR is not very meaningful, as distinct from the 'arranged instrument on' AR. Current usage is inconsistent[2, 3], and an order of magnitude smaller than that of 'arranged instrument on'[3]

Thus I propose that these ARs be merged, and 'instrumentator' be dropped entirely. If the instrument is specified, it should be merged into 'arranged

on', otherwise it should be merged into 'arranged'.

1. http://chatlogs.musicbrainz.org/musicbrainz/2013/2013-05/2013-05-03.html#T20-07-54-85462
2. http://chatlogs.musicbrainz.org/musicbrainz/2013/2013-05/2013-05-03.html#T20-56-50-117559
3. http://beta.musicbrainz.org/statistics/relationships