I suspect you are likely to be able to get 90+.
What is your school rank and position/rank within the Advanced English cohort?
https://bettereducation.com.au/SchoolRanking.aspx
I.e in 2018,2017,2016,2015
I used grid books for mathematics.
Binders to store hand outs (kept them at home) and had an a4 display book to take handouts to and from as needed. Loose leaf sheets to take notes on and then stuck on binders.
Don’t get Excel or ATAR notes forStandard Mathematjcs better of getting multiple textbooks.
Would also think that would be better if purchasing different textbooks for the remaining subjects
Consider teacher quality
How does your school typically do in your respective subject
Cohort wuality?
Do you enjoy Visial Art theory
What do you want to do after school?
Modern scales better than Visual Arts