At this point your mix is still in mono. It’s time to go stereo!
Oh, and you can get out of your loop as well!
I always mix in mono and use panning in the end of the mix. That way, if I can get a great mix in mono, it will be wider, bigger, more awesome in stereo.
Use panning automation to bring movement, variations and keep things interesting.
However, keep kick, snare, bass, and vocals in the center. As I said before, they drive the song, so they should have a central place in the mix.