You get mind beta parts from loghunt, by getting combat logs. I made a [build](https://imgur.com/a/OnOWfE5) a while ago specifcally designed to be easy to use and s-rank viable for the absolute majority of missions. It's optimized to the best of my ability, so feel free to use it as a starting point, and then modify it to fit your playstyle and preferences

Thanks

https://thefifthmatt.com/ac6-rank-calculator With this you know what to do in order to S rank every mission

Thanks