The featuring bracket will always be the most important so it will always take the (), however if it is both a remix and a feature then the remix will take the []
Britney Spears - Tik Tik Boom (feat. T.I.)
Britney Spears - Perfume (The Dreaming Mix)
Britney Spears - Till The World Ends [The Femme Fatale Remix] (feat. Ke$ha and Nicki Minaj)
Am I the only person that doesn't use any of these? I erase the featuring artist all together. I know who is on the track, I don't need it to look ugly with any combination of these.
Opposite. I usually delete the main artist/s and keep the feature/s when I saved them on my android phone. Cause I am more familiar with the main artists than the feature/s (especially when they are irrelevants)