I’ve beat it and have some advice, not sure what you know yet but you never have to check the cameras for chika and Bonnie you will hear they walk up to the door unless it happens like right as you open or close the camera,
the camera is used only for foxie till 5am i don’t have the exact numbers but something like 5secs off 3 secs on is around what I was doing for the most part this should keep her there long enough to stall out her 4th attack late enough to be able to win, if you have the reaction speed you can hear foxie run to the door so it will also take her a bit longer to attack if you wait and don’t check her second camera giving a little more time,
Freddy is the easiest just after 5 am put the camera on the last room she is in and it will stop her from attacking even if you don’t have the camera open.
I have a more in-depth post in a reply to someone else a bit ago that might be more helpful.