The DoMs, get usually much more aggro than DoWs.
There are some tricks to get your enmity as low as possible:
- Don't use Regen, you don't need it. In case of danger use Medica II.
- Don't use healing over time skills (Regen or Medica II) on anyone before any fight, because every HP you heal means 1 point of aggro, and if the battle starts, and the heal has effect before anyone hits mobs, you will be the one with the highest enmity from them;
- Don't spam Medica / Medica II, they heal 3/4 of a single Cure but to everyone, so it's a lot of aggro. Use them only when in danger.
- Don't attack. I know, it's obvious, but people still attack while not healing, and this gets like 80% probability to become the target of every mob in Hydaelyn XD
- Don't rely too much on Shroud of Saints, I personally never use it. Once you halfed aggro, 2 or 3 Medica get it back like before, if not higher.
- Stay away from the battle, as far as possible, keeping the tank in your heal range.