The only HoT (healing over time) abilities we have (that I can recall) are pretty weak enhancements for a cleric, and some lackluster items. How about throwing in some HoT spells for our healing folks? I wouldn't suggest making them as powerful as the DoTs are (my DP can crit over 1000!) but something more than a tasty ham or a pouch of jerky can provide, just to help out in the raids where you have one main tank taking most of the damage from a raid boss.
If this is a terrible idea, or has been proposed and shot down before, let me know. I'd love to hear some feedback about this, especially why it would be a terrible idea.