@lis 1) No, not necessarily. Some pins are mirrored and duplicated, there's not really a good "order" to find there. It's a lot easier to route traces if you don't order anything
2) the CC (A5, B5) pins can go into GND through pull-down resistors. SBU can technically also be, but that's not likely in your case
@agatha You can also do this very well with AMD Ryzen CPUs, I massively undervolted my old X3D CPU without issue making it run faster because it produced less heat