Just wanted to clarify in case runners in the future are curious. Basically when you get on top of the roof to trap her in the Bathroom, most of the time she will not trap herself in the Bathroom instantly. Instead, she will run back to the stairs to go to the second floor, she will go inside West Dorm, or she will run towards East Dorm. You can try to flick your UV light on her to get her aggro back on yourself, but you cannot see where she is and will have to guess based on sound, and even if you do hit her sometimes it does not work anyways. Instead, move back over to where you are on the roof above the staircase that goes down to the second floor. When Molly tries to go down those stairs, she will see you and then come back up to try to get you. Once that happens you will get a heartbeat so even though you cannot see her you will know when she is going for you. When the heartbeat starts just move back over to the Bathroom door. Repeat this process until you can tell by sound that she is inside the Bathroom. Hope this helps!
I would like Flower to give an explanation on how exactly he does it because I know how to do it too and I've done it in coop Asylum Nightmare runs but to my knowledge there is no consistent way to do it. She almost always stops going after you once you get on the roof and doesn't chase you inside the bathroom.
Numbers were a bit off but he's got the spirit lmao