Well put answer, actually, to the question.
Taking all 10 levels of the PRC aren't required, in fact, taking all 10 levels isn't a great way to guarantee Build Stability points. However, whenever a PRC is a required element in the build, it needs to be a central component.
It's the equivalent of handing you a full sized diesel and steam engine and telling you to make me a boat. Will you need to use every last component, pipe, filter, and flange? Doubtful. Will the boat still need to feature and apply the engine as the primary focus? Yep.