Lol, I got around the same ATAR: 89.25
I only got one band 6 though, band 5s and a band 4 (lol 79 - 1 mark off a band 5).
Although my subjects were mostly scaled fairly high: EngAd, Bio, JapContinuers, Studies of Religion 2 unit and Anicent History.
I also used one of those ATAR calculators...