Ah, true. My perspective on the DPS role healers play in trash pulls is a bit skewed because as a SCH I can basically sit in cleric stance 90% of the time and have my pet handle most the work (really not an over-statement), while using bane to spread the DoTs to the entire group swiftly. But when working with a WHM, then they only have luxury of really joining the DPS in earnest once you thin the herd which probably outweighs the DPS difference