There isn't an easy answer to this, it depends on your ability and aptitude, whether you can concentrate after a long day at work and whether you're self studying or also having courses.
Basically, I'd say quality is more important the quantity. Question practice and note writing (especially mind maps) more valuable than reading and days off are also important.
I passed all my exams by doing two hours, two evenings a week and 8 hours on Sunday and I did weekend revision classes but no taught courses.
Make sure you comfortable with the syllabus a month before the exams so the final month is revision and question practice only. Work out how long you've got between now and then and write yourself a study timetable then don't let yourself get behind with it.
Good luck, Cat
I much appreciate your advises.
For the strategic level I was doing three hours every day including weekends.
Essentially I would recommend to go through the book only once but make sure you understand every topic well. Then use the passcards to keep refreshing your memory.
I would practice exam questions after that for two months before the exams. And then I would keep practicing my timings to ensure that I could every question in the specified time limit.
when you say you did 3 hours a day was that over a 6 month period or a year?