I like cover skill cuz, in another mmo, as a PLD tank (support oriented)I got to use cover skill, but in the other mmo it was called sacrifice. It would last 30 secs on lvl 1 and would increase the duration time up to almost 2 mins on lvl 6 sacrifice. That was a Paladin Pure support class. Paldin class was able to become pure dmg/support/ or hybrid.