Dw bro, I had the exact bands as you. I got an atar of 84.8 and was predicted a 92 at my school. I really don't know what happen, but I sure did get close to my atar aim, which was 85+.
I know a friend who came first in 3-4 subjects and only got 72.40. So cheer up as it could've been worst!
Yes - you, solely, are responsible for 1/4 of my atar. Also, my external 2U mark was higher. I saved yours. So why don't you make a judgement on something if you know the facts.
Now what about compulsory English, Naveed?