If you make a new account and use only the routine of TuanHa Millz or what is the probability of getting a new ban?
100%. I've botted for over 5 years and never got banned till legion. I can tell you that if you play, for example: at least 3 days a week with about 5 hours of play you have an extremely high chance of getting hit unless they come up with better measures to combat their anti-cheat.
Never? Not much they can do unless they know exactly why it's getting detected and there no certain way to tell how it is getting detected.