In dungeons, being in Tank stance is often more beneficial since you are doing big pulls. When you play with pugs, it also make your health more stable and reduce damage spikes if paired with a good cooldown management... which creates great opportunities for healers to DPS. What a small world.
But whatever the case, the gain between tank stance vs. DPS stance is tiny compared to what a healer can provide in terms of damage output if they weren't just sitting in the corner, waiting for the tank to get to the EXTREMELY DANGEROUS THRESHOLD OF 90% HEALTH OH MY GOD HE'S GOING TO DIE WHAT SHOULD I DO HERE TAKE A CURE II OMG OMG OMG BENEDICTION IS ON COOLDOWN BECAUSE I USED IT WHEN HE WENT TO 95% HP 2 MINUTES AGO HEALER IS SUCH A STRESSFUL JOB!!11!1!1!!!1!
