I'm gonna say this right now, I've been grinding for this for over a fucking month. All it took was finding a new dmg boosting strat. I gotta admit though, I thought that wouldn't save time and I never expected even getting something lower than 18.6.
I might implement the new dmg strats into a possible next run (although I did play this controller. yes, a scratch game with a controller) so I might practice this for keyboard.
Run starts somewhere at 1:52, used a switch pro controller as my controller. Remixed the project a bit because of the ducking (I always ducked with the joystick so I made it into a button) so please let me know if that's not good.
Mod Note: it's good, you probably just changed a couple of lines of code that did nothing but just change the buttons. If you tampered with the project though then this will be not verified but we know that'd you would not do that.