Ideal strategy, (I believe) get headphones, make sure both sides work, and DO NOT HAVE MONO-AUDIO ENABLED, Chica and Bonnie make a noise when they reach their respective door, and the noise comes from their side. Use the cams to check Foxy only, and only have it on for a second or 2 at most, make sure to check about every 5-10 seconds. If you see Foxy has left Pirate's Cove to run to your office, close the cams, close the right door and hover over the left door close until you hear running, then close, and close the door when Freddy laughs about 5 times, and re-open when they leave, the rest of this game sadly is pure luck.