Nvm I figured out a strategy if anyone else is having some struggle with night six.
It sounds weird because you're trying to save power, but use the cameras. Though only keep them on foxy. If she's not outside of her curtain just be normal, but check on her every 10 seconds or so. (also I mean like fully out of the curtain). If she is out then check on her every 10 seconds, looking at her on the cameras stalls her. The moment shes gone get out of the camera, don't look at the hallway, and be ready to close the door when you hear her. Then just rinse and repeat until the nights over. Also, prioritize animatronics at you're doors and if there is one then don't check the cameras until they've left.
I wish everyone luck and hope that some found this strategy helpful. Also very good game only complaint is honestly foxy taking power and being super aggressive