With those subjects it will be quite difficult. You are going to have to do very well in general math and I&DT even more so (VET courses tend to have some of the worst scaling in the hsc). This shouldn't be a concern if you're good at it, but you'll have to absolutely kill those subjects to get...
My advice for the hsc is do what you need to do and do what you want to do.
its good to have a goal, but make your goal what you want personally not what someone else wants of you or you will hate the next 10 months of your life. I knew what i wanted for university and i knew what i needed to...
Look to be fair i crammed all my physics prep into the arvo before, starting at 2pm or so. I also hadnt even finished my option topic at that point, but whats ridiculous is that my 3rd internal was only an 88
as i said in the other thread, you should only be choosing it if you ENJOY it. in your situation since you have a very full load, are any of your other subjects particularly weak by comparison? if so it might be worth taking MX2 and dropping. it also depends how much time MX2 is going to eat up...
if you are good at maths (and i really mean GOOD because that's already quite a full subject load) then it would be worthwhile but likely not without dropping another subject, which would probably be one of the sciences?