This is an attempt at explaining the process, but without covering some extra statistical procedures in the process.
Your actual SAC score is not really relevant since you deem yourself to have ranked in the top 2-5% of the cohort. The SAC score ranking is the important figure as this is used to work out what contribution your work at school makes to your study score.
SACs contribute up to 34% to your study score and your actual SAC score number does not figure in this calculation. That is because consistency between schools and the difficulty of their SACs and how they are assessed cannot be guaranteed.
The actual contribution, out of 34, is calculated from your school cohort’s actual examination scores and your ranking in SACS. For you, that number out of 34 will come from around the top 2-5% below the top of the range of exam scores your whole cohort will achieve in the two November exams.
Let’s say tha works out to be 80% for you. (Your highest ranked student would get the cohort’s highest exam score as his/her number)
So you will get 80% x 34 = 27.2 out of 34 toward your study score for SACs. In short, your cohort’s SAC marks do not matter, but the cohort’s exam results do matter, and determine the SAC component of the study score.
The remaining 66% of your study score is entirely up to you. This comes from your own actual exam scores that you can continue to work hard to ace in November. Each exam will contribute up to 33% to your study score, and these will be added to the 27.2 for your SACs. Let’s say that, for you, that all totals 91.8. As this is a percentage, your study score would then be 45.9 out of 50.
If you can follow this explanation, you may see that achieving 45 is still within your reach. The only part you do not have a great deal of control over is how well your cohort will do in the exams. Just continue to do your own best.