Ok, so I've been doing some questions in the Q bank. At the beginning, it asks what kind of questions you want and I always select ALL CFAI topics and I select CFAI weight for the questions. Under difficulty, I've been selecting the Advanced, Intermediate, and Basic mix; my question is, is this mix what I should be selecting to best "simulate" the actual exam (and thus the actual scores) or should I be selecting some other mix to "simulate" the exam?