Werent you going to try a shockadin group? That would be my guess.

If youre planning on only healing, I also think holy priests would also be difficilt to kill since youd have 5x prayer of mending, circle of healing, prayer of healing, and lightwell. Disc priests would have pain suppression and penance but would be missing circle of healing and lightwell. You might miss a pally bubble but it will probably be dispelled anyway.

When i get all my priests up, i plan to do this same thing.