Originally Posted by Ghostcrawler

Holy and Discipline healers
If any class is the "fill in the gap" healer, it's the Holy priest. Their strength is in versatility -- they have single-target heals, group heals, instant heals and hots. The standard (but by no means only) way to heal a raid is to have a Holy paladin on the tank along with a Resto druid, have a Resto shammy AE heal the group, and then put the Holy priest wherever you need them. We are also trying to get the Disc priest into a role similar to the paladin, but based more around damage avoidance than efficient, quick heals.