In my case on levi ex, 1single stun from dps wont be the end of the world.. It's true people or more to like dps who doesnt know the mechanic should just learn but in case both tanks are warriors, tanks might need to stun only dreadwash while letting dreadstorm casted on the ground.. There is a way to make things better rather than pointing people's mistakes, especially since i've seen tanks blaming melee dps due to "invulnerable to stun" during dreadstorm being casted more rather than random stun from dps..