Looking at Satan's profile, I don't see how he can defeat the ghosts given his non-physical interaction isn't explained and ghosts have several intangibility methods, his power mimicry is useless since Ghost Physiology isn't a technique/fighting style and Satan's profile doesn't show he can copy something like that, ghosts have infinite stamina and thus can outlast him, they possess low-godly regeneration as well as resistance to soul based attacks and matter manipulation (ectoplasmic energy works on a biological level (molecular), and they can all attack the mind, soul, and body (molecular level) with their attacks so Satan's durability and regeneration mean nothing.