Given this information, your current performance is consistent with an ATAR of approximately 94-95. Your HSC mark in Mathematics Advanced means that this subject will make a positive contribution to your ATAR and, while your performance in Mathematics Extension 1 is also favourable, I think that this subject will not end up counting towards your ATAR, because your performance in your current subjects is of a higher standard, and also because English Advanced must count as two units towards your ATAR (see below).
In terms of your current subjects, your position in Economics, Physics and Chemistry is favourable, meaning that all three subjects are likely to make a positive contribution to your ATAR, similar to that of Mathematics Advanced. You should therefore ensure that you maintain this level of performance by thoroughly preparing for the HSC exam of these subjects.
English Advanced is your lowest-performing subject, meaning that it is likely to make the lowest contribution to your ATAR at this stage compared to the rest of your subjects. At the same time, Mathematics Extension 1 cannot reduce the contribution of English Advanced to 1 unit because 2 units of English must count towards your ATAR. Your position in this subject therefore indicates that there is room for improvement. Hopefully, you will have focused on addressing those as much as possible in preparation for this subject's HSC exam. Improvement to your overall performance through favourable HSC exam performance would help you reach an ATAR that exceeds this estimate.
I hope this helps!
