Let me throw out the usual preface–everyone learns differently, etc.
In that vein, let me answer your question in a well different way.
IMO, NINJA MCQs greatest value is the quality of questions and their solution set. I used them exclusively to pass (insert obligatory “Not a paid endorsement” line here).
I never subscribed to the notion of focusing on quantity of hours spent studying. Rather, I spent no more than 4 hours a day. I focused on learning concepts by taking 20-question blocks for each of the 5 or 6 subsections. When I got 80% correct, I moved on.
Jeff's metrics and phases never did it for me. To me it's like focusing on a weight number when you're working out rather than a performance goal
So more to your question, if you budget 4 hours per day to study, give yourself 20-30 mins to review questions. Know why you got them wrong and why you got them right.
They don't trust JUST ANYBODY to count beans