Dropping tank stance sounds silly to me, you risk losing aggro and dropping dead from taking too much damage. I've been put off ever wanting to heal Arum Vale ever again because tanks run in there with sword oath and are taking more damage than can logically be healed for with adds splitting off and hitting me and the dps, and then the tanks blame the healer for not healing them enough! I've burned through every bit of mana spamming nothing but heal spells with people at near death just so a tank could play dps in sword oath. It's not a dps job!