btw, a friend of mine got a UAI of 95.9 with 10 units, consisting of Standard English, General Maths, Food Technology, Studies of Religion 2 and Visual Arts. I think that was a rather excellent effort, and would probably be one of the best UAIs possible with that combination.
In my unqualified opinion, I think different subjects help one score a higher UAI in accordance to the varying circumstances of each year. While this year it seemed students with spectacular scores in Mathematics, and lower scores in Advanced English precluded them from scoring a higher UAI than they would have in 2001, in 2003 students across the state may score better in Advanced English than the students of 2002, causing Mathematics to be a more authoritative subject in the mystery that is the calculation of UAIs.
And now I shall wait patiently for the vultures on the forum to pounce on my speculative thoughts.