I use theclicker(https://crates.io/crates/theclicker), it wraps your mouse as a new mouse (you will need to set sentivity in settings for the new mouse). I can get 40CPS and mainly use it in idle games

It works nicely for me but as it uses /dev/input/eventX i don't know if it's consistent across reboots for hardcoded scripts (although so far it worked without issues)