@dredeuced: Palmer also rides winds ( glides). His power isn't just to alter size but mass. Originally he could alter hisass from his normal full heights santo anything below. after power of the Arom however he can induce greater From his piece of white dwarf . He used this to have an "atomic punch"
You act as if Barry has a way of seeing Ray, he doesn't. Palmer can be at sizes well beneath the notice of a full size without going sub atomic. As weightless gliding on the wind he can wait until his quarry isn't moving at speed and then draw more mass to fall on him at a weight, or land and attack him from say his inner ear (imagine the damage one could do to themselves running at super speed and loosing balance?
Barry on the other hand has no way of actually striking Ray except Maybe winds bursts.