heal operative or razbot (merc)
Tank hybrid Sin or Dosx (pt)
Mara middle tree
Offnode sin/operative (sin a little better imo because of increased utility)
Sorc, jugg/mara smash, pt, sniper
I prefer pt so you can isolate your opponents with pulls.
Sure you can run two non-sorc heals, I think it works out well if you can have a dps sorc with bubbles. Otherwise, it really limits your ability to cc as effectively as possible.