Well, Wasp is pretty good, a first class hero in her own right, but I think that 'ol Boomer could probably at least break even here. Yeah, she's downright sneaky and excellent at surprise attacks, but then again, so is the good Captain. He's fought the Flash zillions of times, and had him on the ropes more than once. In his bag of tricks are more than a few boomerangs which would probably prove very effective against Jan. He's got sonic boomerangs that would paralyze and drop her without ever having to touch her, explosive boomerangs that could knock her out with a concussion wave, and boomerangs that could track Barry Allen moving at his fighting speed. Before being turned into a joke in the 80's, Boomerang could definitely give The Wasp a run for her money.