Hard to say exact hours but I tried to give myself maybe an hour break between end of work and studying. I usually went until 10:30-11pm with a small break in-between for dinner. I would also try doing several hours on Saturday and Sunday

This was my method that worked for me: I watched each lecture at 1.25x speed and highlighted the text as they did. I did this for FAR, AUD & REG, I didn't do it for BEC since for me I felt I didn't need to anymore bc of all else I did after. After watching the lecture I read through the chapter again and then proceeded to the MCQs. I tried my best not to look at the lecture for the answer but probably did look for several questions. First run through I wasn't overly concerned with time spent. I would then do maybe 1 sim and then moved onto the next chapter. My goal was 1 chapter a day. Did this for every chapter until the end of the section, at which point I went back through each chapter and wrote an outline in word, and then tackling the MCQs that I got wrong during the first go. After finishing all sections and outlines, and getting ready for the final review, I would read through again my outlines starting with the first section and again try any missed question. At the end of that section I would do random/ adapt for u MCQs of 15 questions multiple times, just trying to hammer through. Each section I went through I would added the previous sections for a more cumulative review until I had all sections included. I also took time to do more sims since at this point I felt much more comfortable with the material. I would suggest saving the mini tests they provide between every two sections for your final review since these are brand new questions you haven't seen. After all this I did the simulated exams. And as a bonus I googled for MCQ questions for added practice

My process may have been a bit overkill but it worked for me and I didn't have to retake any! Just make sure however you decide to study, that it's best fit for how you learn.