Which course is your goal course? Like, whatever it is - put that one first, even if it has a higher ATAR than what you think you might get.
I think this was
touched on in the new AN podcast, and has been said heaps of times across the forum - put down your preferences in order of what you want to do most
Because, like, a) you might get a higher ATAR than what you're expecting, in which case, wicked!, but also b) even if you get a lower ATAR - it's not gonna stop you from getting offers from lower down on your preference list.
Each uni will independently decide whether they're gonna accept you for a course that's on your preference list, but you'll only get an offer for the course you get accepted into that's the highest. So like, you might get an offer for every single preference you put down, but you'll only get offered the one that's on top of your preference list, etc.
But like, say hypothetically, your dream course has a 95 ATAR. And the second course has an 80 ATAR. You decide that you're gonna put the 80 ATAR one down first, because you know you can get into it, but it's not actually the one you want to do the most. But, say you get a 96 ATAR. You've done enough to get an offer for that dream course, but if that 80 one is first, that's what you're gonna get the offer for!
Plus, as a side note, clearly ins can change around a fair bit
Hope this made some sense. Basically, just trying to say - order based on what you want to do the most.
All the best!