think whatever- im not here to prove a point but merely offer advice.
I think that if youre struggling with english i.e ranked in the bottom2/3 then it may be wise to invest in a tutor. But if you do, then i recommend you dont skimp, instead go for a private tutor. They may be a bit more costly, but then you'll be getting one on one help relevant to what you are learning- and besides, its your HSC- no point being stingy.
From experience, i find it helpful if you prepare real well for youre exams. Write essays and get youre teachers to critique them, because ultimately, they are the ones who will be marking your school assessments and in turn determining your ranks. AND before doing an exam, although teachers dont like the idea, having a generic type essay really helps!
I don't want it to seem like i have a vendetta against tishler or anything, but he is not a good tutor. When it comes to year 12, my friend (who is looking for another tutor) tells me that instead of localised studies of text, he just teaches the general information which suits everybody, even if theyre not stdying the same texts- which negates the purpose of having a tutor.
Final words- its up to you. But if you do end up going eng tut, i think private is the way to go.