Holy spam can stun, yes...

But then, SCH (with 3 aetherflow stacks) have 3 ogcd lustrates that heal for a hefty amount plus the faerie healing while it Miasma 2's the packs of enemies.

Also, I have no idea how people think WHM is the "easy healer"... Between SCH's Lustrates, Indomitability and Faerie off-healing, I really feel bummed at the "raw healing potency" of WHM.