I think you should drop chemistry, aim a little higher in Music 2. Make sure you kill your externals. Also i calculated your scores and your final ATAR isn't going to differ if you drop a a subject as they only mark you best 5.
All the best!
It doesn't really matter what subjects you do, as long as you do well in them. True thats some subjects are capable of scaling you higher, but if you're no good at them, then you will find you will not benefit much. Im in year 10 too and am planning on doing:
-Adv English
-Ancient History...
You're ranks are excellent!! Make sure you keep up the good work and without a doubt you'd hopefully end up getting in your mid 90's. Just make sure you do well in your externals.