In that case, would you recommend first completing relevant chapter reviews from both textbooks (maths quest and Cambridge) and then commerical papers? I haven't done a VCAA exam which had commerical papers available and therefore am not experienced in the accuracy of commerical papers. I have also considered leaving VCAA papers for the end but am concerned commercial papers may not be as good as past papers. Maybe there are certain companies that are well known for good methods papers?
I think moving on with the chapter reviews is definitely the best approach at this stage. As for exams, I’d recommend starting with 2006-2012 VCAA past exams to get a good feel for the level of knowledge required at the end of the year, then move on with commercial exams, saving the best for last (2013-2017 VCAA past exams) in the last few weeks before the exam.
In terms of commercial exams, I’d say:
Kilbaha: Very difficult, well written questions, enhances problem solving skills, some exam 2 questions are insane
MAV: Similar difficultly to kilbaha, perhaps a tad more accessible, good practice for advanced students
NEAP: Again similar in difficulty and quality to those above
Heffernan: IMO the best exam company, well written and average difficulty similar to VCAA
TSSM: Average difficulty but question quality can miss the mark
Insight: Similar to TSSM, I’d probably avoid both if possible