I'm not sure to the extent of it boosting Assassins, I thought about it for awhile, to the best of my knowledge double hits only go off the primary hand, so why would an assassin give up all of his crit chances in order to get a 20% chance to have their primary get the chance to swing (which would be far less of a chance becuase of the faster the weapon delay than a bow would, the only exception would be the one dw from lyceum with the 4 second delay) Eitherway, anyone who thinks 5% incombat movement speed is useful is ... well, just bleh