Stormcaller, hands down. I main a Bladedancer and I hate to say that any Stormcaller Warlock that isn't full derp would annihilate even the most seasoned Bladedancer. Stormcaller lasts longer, hits more targets harder and has greater mobility. Add to that the Landfall perk and even if a Bladedancer gets close enough to swing at you, a well timed Super use would knock him back, if not kill him outright. Truth be told, Bladedancer, outside of it's usefulness in resurrecting teammates and other useful stealthy things, it's damage beyond red bar minions has always been lacking. Not to mention nearly every PvE element has a f@%k melee ability.