I would definitely advise NOT to go ahead with the 7 subjects in year 12. You sister will basically have no free time, because she will always be studying, no free periods at school, meaning all study, no chill out time, and with Distance Ed, more responsibility for a subject which may not even end up getting used in the final ENTER calculation.
Why do 7 if one doesn't even end up counting? I was going to do 2 year 12 subjects last year, but didn't because I wanted to do 5 this year, and didn't want one to be excluded. Lol, if it was me, I'd develop a whole new study program; include some languages (scaling to the MAX), and if she enjoys the Asian 5, then I guess she should pay more attention to those subjects and not so much to Psych or T and T (one won't even end up counting AT ALL, so she might as well drop one anyway).
My two cents.
