Substantially squishier in the 51-59 dungeons compared to war/PLD. It was mainly when they pulled multiple mob sets though that there was an issue, they get bursted down extremely fast. Particularly ones in DPS accessories... As a WHM I could always carry a bad tank but when I went AST there was one time a DRK pulled pulled 2 groups in The Aery--I was in Diurnal, had Aspected Benefict up and spammed Benefict II. His incoming damage was greater than my output--I was able to keep him up temporarily, but AST only has a couple tricks and I didn't get lucky on Card draws. Dead DRK, we wiped, oh well. No big deal except that he decided to do it again, which caught me completely off guard the second time because as a tank main I can't believe anyone would be dumb enough to do that. T____T