I'll like explain what my own strategy is

I normally go through cameras collecting coins, and trying to avoid Crimson Duck as much as possible.

An important thing I do is to ALWAYS keep track of where Toby is, I recognized in the plaza based on his pose in there I know exactly where he's gonna go to, and if he's not in the rooms with any of the breaker boxes, I can assume he's probably in either of the side hallways, which I could check the cameras for him, or be a little bit risky but more power friendly by using the hallways lights, otherwise he'll probably end up in the main hallway where I'll just have to flash him.

One more important thing is to get the plush for Crimson Duck when you can, coins are pretty important to have not only for that but also just having some leftover just in case to buy extra power

Also at least for me Lil' Duck can be a little bit tricky since he's moving faster but not by a lot, I've had a few times where I didn't click him or caught onto him being in the office too late.

Since I've got the insta Emma, having to deal with 3 extra characters all depends on who's there and how much each one can mess with you

but yeah