Given this information, I believe that you could be looking at an ATAR in the low 80's region, more specifically between 80 and 83. Mathematics Standard, Legal Studies and to a slightly lesser extent PDHPE appear to be your best performing subjects. It is therefore important to ensure that you are preparing for the HSC exam of these subjects to the best of your abilities in order to maximise your chances of achieving the highest possible ATAR.
On the other hand, English Advanced and Economics appear to be your lower performing subjects. Based on this, you may wish to consider placing additional focus on your preparations for the HSC exam of both subjects (particularly English Advanced), which will enable you to improve your position, hopefully leading you to your target ATAR.
The good thing that should be noted is your improved ranks in your trial exams across your subjects. This is a good indicator as you approach the HSC exams because your comfort/confidence with the format of trial exams (which aims to reflect that of HSC exams) is likely to be reproduced as you complete your HSC exams, provided you thoroughly prepare for your exams.
Of course, providing the number of band 6's achieved at your school in each of your subjects could potentially allow for more accurate estimates.
I hope this helps!
