Based on all of this extra exposure to the DF for the zodiac quest, I can say with confidence that more WHM's need to be using Holy and Benediction.

As a Warrior, I can generate a ton of HPs with Berserk/Bloodbathed Overpowers during the stun duration of Holy (with ToB and 2nd Wind on backup).

Once the massive pull is all in position, floor AoEs are down, and I turn on the blender, the sound of Holy is a like a symphony.