I don’t know as much about predicting study scores as some people on here but I know a few things that might help you.
1. I really doubt everyone else is averaging A+. Even if they are they won’t be next year. In order to be able to rank people you have to be able to tell the difference between their abilities - that’s why high achieving schools generally have harder SACs. If everyone gets 100% on everything it’s impossible to rank them.
2. The easiest way to predict what rank you need to be to get a certain study score is to look at how many people each year at your school normally get that score - you can look at it on the high achievers list (just google it). If about 30 people get 40+ each year then you want to be in the top 30 ranks (preferably not #30 though). If about 60 people do methods 3/4 at your school each year, then you know that you want to be in the top half of your cohort.
3. You don’t want to be ranked right at the bottom - regardless of what school you go to there’s going to be some people who do badly.
4. The marks you’re getting now aren’t necessarily reflective of the marks you will get next year. If you know anyone whose doing 3/4 methods this year you could try asking them if they found getting higher marks easier in year 11 or year 12.
5. What did you do differently in the exam to get better marks? If you don’t know try experimenting with different study or exam techniques so you know what works best for you
before you get to 3/4.
Also there’s some information over in
Victorian Technical Score Discussion that will help you understand how it works, but it’s very difficult to predict even after you’ve done all of your 3/4 SACs so it’s basically impossible to accurately predict now.