Wallpaper on the ceiling, damage to the drywall, what now?
Stubborn wallpaper is almost always easier fixed by either rip and replace drywall (allows you to fix anything else while you have access) or drywall over (have to extend or move any penetrations of the ceiling.
8-10 hours already spent for a 25 foot square patch - could have been done already if you ripped and replaced, IME.