Deezer track metadata

Hi everyone, I've got a lot of tracks from Deezer where the artist is Artist1, Artist2. since they are featured artists etc. What's the best way to deal with this since I scrobble to last.fm? Would it be to add another tag 'featured artists' and move the data there? In last.fm the featured artists are not usually in the title at all, so I've set my scrobbler to just use %albumartist% instead, but I'd rather clean the files and use %artist%. Is there a correct way to fix these files?