I was damage dealer in our guild group that flew you through the instance, you should be grateful for the quick xp instead of bashing my play style first in game and now on the forums.
I am entirely geared for power, preci and critical damage = damage dealer. Switching attunement only reduces my damage since even with autoattack I’m doing atleast double the damage than in any other attunement(splash damage, traits for fire).
For survival I’m using lightning flash, burning retreat and signet of restoration and those are usually enough when I’m not getting one or two shotted by dungeon mobs. Prolly going a bit more survival oriented gear would be better for the overall damage output, but switching water with 0 healing or any other attunement is waste of time and damage.