Bonnie is not deactivated on night 3, she activates around 4am, which is also the time I keep dying at, most of the time to Bonnie and freddy
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OK, so here's how to deal with the girls:
Bonnie/Chica: Don't look for them on cams, it's a waste of battery, simply wait till you hear a stepping noise at one of the doors and shut the door on them, then check the lights to see when they leave.
Freddy: Freddy will laugh whenever she moves to a new room. On her fifth laugh close the right door. When she laughs for a sixth time, it's safe to open, as she moves back a room. After that it's just a cycle of closing the door when she laughs, then opening it when she laughs again.
Foxy: Only really moves when you arent looking. When she is no longer visible on the camera, quickly change to camera 2A to see her running animation, then close the camera and close the left door. After three knocks she will move back to her camera, where she will either go back to Phase 0 (not visible) or Phase 1 (peeking out of the curtain).
Golden Freddy: If she appears, just open the cams and you'll be good.
The Donut: Just don
I haven't tested it but I feel like the normal 4/20 strat for the actual fnaf would still work. As long as the devs didn't change foxy's mechanic of not moving as long as cams are open in general that is, because otherwise camstalling freddy whenever she is on 5th laugh and closing right door whenever you need to do something not on the camera would be optimal