For you young shaman wondering why we would want a dot that was not as good damage to mana ratio as our poison ones;
(1) This dot has high dps (damage per second)
(2) This dot has no DD (direct damage(which has a high chance to break root)) component, making root dotting a lot easier. at max range from mob Pull with malise, cast root Cast this and epic back up to max casting range and cast Bane of nife or envenomed bolt if ur pre 56 and then if the DD portion breaks root reroot the mob as its running toward you.
This method becomes better for xp than tanking a slowed mob with stoic chain canning when you start getting to mobs that hit for over 300 like in PoP.
Me personally ill put on like 5 or so dots with this method.