The paper will rarely throw up surpirses in terms of the topics asked, overall accounting is probably one of the easier papers to predict. Ask most people and they will be able to tell you roughly what to expect for the mocks. Are you planning on doing the 120 mark question or the two 60 marks?
For now studying should just be repeating questions, do the questions on a blank sheet of paper not looking at past solutions to see how the layout and format are, this isn't productive studying. Answering on a blank sheet of paper is a slow, but rewarding method, you will expect to get stuck doing this at the start but getting the question wrong is best for the long term memory knowing not to make that mistake in the future. Further down the line attempt to practice mock papers, these are harder than the state exams as they throw up very difficult workings
It depends. The 120 mark question is a guaranteed Final Account which comes up every year, and there's no theory on it. If you're good at those questions, it's worth doing. On the other hand, if you really hate Final Accounts then the 60 mark questions should also be okay - it's just that the exact questions aren't guaranteed.
Choose the questions you like and only study them as guess what, you have Options.
For example Q5 is remembering ratios and is usually more or less the same every year, which doesn't require too much studying, which is a question guaranteed to come up Interpretation of statements.
Read the exam papers, and compare what is most likely to come up, but also remember to study.
Guides are below on all subjects for extra help and advice, I hope this helps, Adam :)