I'm not sure if the 2nd guard has two RNG paths to take or i did get too fast to his path, but stunning him does work well. Also i could skip killing the 3rd guard, but i killed him for safety. Also on the second part where Trane does climb up the pipes in order to do the 4th graff i think you can jump the ac box early without climbing up the first pipe (from the shimmy position of the first pipe i mean not from the ground). I've got it only once in a random try, but i'm not even sure if it did even actually happen, anyway it only saves 1-2 secs so it's not even worth it to try if there isn't a consistent way to do that. You can also go in stealth on the last butcher mini-boss but i haven't been able to insta-kill him, Trane grabs him maybe i haven't done enough tries to make it happen.
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