Given this information, your performance seems consistent with an ATAR of approximately 97.5. This is similar to my earlier estimates. Your performance is essentially favourable across your subjects, with some differences between individual subjects.
English Advanced and Economics are your best-performing subjects, given your optimal rank and predicted HSC exam performance. The fact that you are ranked first in these subjects means that the moderation process would work in your favour if you also achieve the highest HSC exam mark in these subjects within your cohort. In such a case, your overall HSC mark would be made equal to your own HSC exam mark.
Mathematics Extension 1 and Chemistry are some of your better-performing subjects, although the standard is lower than that of English Advanced and Economics. As such, both subjects are likely to make a positive contribution to your ATAR, although it will likely be lower than that made by English Advanced and Economics.
On the other hand, Mathematics Extension 2 appears to be your lowest-performing subject. This does not mean that your performance in the subject is unfavourable, but that it is the lowest compared to the rest of your subjects. Because of this, this subject can make a positive contribution to your ATAR, although it may end up being the lowest out of your subjects.
I hope this helps!