I watch tanks not use all their resources on almost every occasion. You can mitigate dps with Reprisal and Arm's Length. You have a limit break that will just sit on 1 or two bars cuz barely anyone uses it in casual content like dungeons. You have your invuln which you don't owe it to the healer to not use because it hurts their feefees thinking you dont trust their healing, which you shouldn't because you don't know them in Pug roulette parties. I watched a Gnb not superbolide with 10 percent of his hp because i had fallen behind because of an irl distraction. I had to blow ALL my resources to keep him alive because he didn't invuln. you have resources and NO tank should ever have trouble in dungeon content unless its pre heavensward...screw ARR dungeons just saying.