Or ... tanks can just pay attention and learn how to provoke (which shouldn't even be needed because they should be #2 or 3 to begin with). There's no need for them to take unnecessary damage. Every single time I've seen Angra go on a rampage on DPS/healers was when the other two tanks were just blindly standing around in Shield Oath/no Defiance. If Angra has time to kill 5+ people and still not get picked up, the other tanks have done something very, very wrong.