I used the same method Frank Abignale used to pass the bar in Louisiana.
I was distance learning, did the classroom stuff early to get the box ticked, but couldn't find the time or motivation to study. I thought if I don't do something drastic, I'll never get them done. So I took 4 weeks off work and booked the first 4 exams - so that there was no going back. Then I smashed every QB I could find, making sure to youtube/Google every question I didn't understand, and work out every question that needed working out (so as to learn technique, not the answers). Eat, sleep, learn, repeat. I averaged one subject per week, maybe 60 hours each. In test week, I took two exams on Monday (the most recent two) and the remaining two exams on Thursday, (giving me 2½ days extra revision). It seems I thrive under pressure, and I averaged one subject per week. It probably wouldn't work for everyone.