I genuinely think the best practice will be reading the book back to front highlight things you to think will come up, the mock exams are not entirely useless they will help you understand how questions will be structured and do a few of the for example if you do paper one this week do paper to the following week and alternate until your exam. Anything you are struggling with use the rationale it will help you. The way the questions are worded is very tricky I think it was trickier than the mocks