At the moment, I'd be putting you at about a 95 ATAR.
The best advice would be to improve your English, as that has to count as part of your ATAR. It is hard to determine how well you will actually do when you are topping the subject, as it depends on your external marks, however, keep working...
I would put you about 85 ATAR at the moment.
You need to really improve your Adv Eng to have any hope of getting a 90+ ATAR, as 2 units of any English are compulsory components of your ATAR.
A better way of knowing would be to know how many B6s, B5s, etc. your school gains for each of your subjects to really work out a better estimate.
Nonetheless, I would put you at approximately 65 to 70 ATAR.