1 - NEVER let Foxy attack your office door without seeing her run in the hallway. She magically drains more power if you don't see her running.
2 - If your camera is on the Kitchen, Freddy can't attack. Put the camera on the kitchen and keep the right door open if she's in there. Only close it if you need to check on another camera.
3 - If you have decent hearing, you don't need to check the lights for Bonnie and Chica. You can hear them approaching with panned audio and just close the door. They move every few seconds, so just do a quick check on the lights every few seconds until they're gone.