"Album Artist" vs "Artist" - please help an iTunes convert

Relating to this I found this thread: Decoding Mapping of File Based Tags to Roon

I would like to keep my tags so that they work with Roon AND any DAP as well, so Album Artist vs Artist is important.

I am faced with two situations based on this:

  1. There are two acts in one song, eg. Artist field = “Performer 1 & Performer 2”

  2. There is a featured artist in one song, Artist field = “Performer 1 featuring Performer 2” - this latter example would be best served by adopting the PERSONNEL tag described in the above thread? I have up until now added this in the Artist tag - “Performer 1; Performer 2”.