Personally, I think they're the two weakest stamina classes. I would say that class identity wise, Stamina Sorc is in a better spot. Because theres at least some identity there with mobility. StamDk has a really rough time with any of the three classes with a purge, and doesnt have the mobility to chase a sorc outside of a few errant leaps. And sorc is probably better for revealing nightblades with their hurricane