I cringe every time I see a DRK with 13k HP in A4. Of course two orbs instakill him before healers could react. Of course we wipe. Of course he wastes our time.
Strength tanks are egoists who don't understand the simple concept of soaking damage where only HP matters. Will their 'extra dps' help us to finish the trial faster? Of course not. But extra HP surely can.