Lizard said:Not really. It basically gives you two attacks in a round, and with the "Economy of action" in 4e, that's pretty good. Use it when a foe is on its last legs, knocking it out of the fight before a healer can do anything about it.
Not only that, assuming both attacks hit, it does 1*[Your W] + [Your STR] + 1*[Ally W] + [Ally STR] - that should approach 2*W + 2*STR - it does more damage than the average encounter power I've seen, even without a striker's damage boost on top of it.
Lizard said:Making it at-will would be too powerful, and I don't think there's a "twice per encounter" mechanic in the game. Is there?
See Healing Words.