Are Shadow skins just impossible? If you clear the desk you can't watch Foxy. You have to keep the left door closed then. But you also can't distract puppet or Fredrika, so the right door needs to be closed. You can't do both.
I fail to see how this is possible, even on easy I only made it halfway through the night roughly, and most of that time was spent staring at Foxy's butt and hearing footsteps getting closer.