Possible bug?
I made it through my first run, 23 blues and 1 gold, on daytime in the city with nothing extra. My pinky is still sore from holding shift almost the entire time. Took me about half an hour. Never once saw Toy Chica. I saw a little bit of her destruction, like some light posts being knocked down in the southeast region, but never her.
Try a second run, turn on Blackout, Double Trouble, and Xray. Start running around, decide to go east just because, see and hear two toy chica on the other side of the building from me. Suddenly, the one in front turns to her left and blips out of existence. Never seen again, as I come out from around the corner and only see the second one.
Not certain what happened, but I'm curious if this is why I never saw her or any further destruction in my first run; She just despawned for some reason. Couldn't get it to happen a third time, if that is what happened, in my following 4 short attempts, but I wonder if this may be a bug to be checked.