yang_dong:
It seems a little counter-intuitive for me to be doing this sort of work since this is what you're expected do to in order to understand the text. It looks like you've got some starting points so see where they take you. If you're struggling with text comprehension then it might be worth consulting your teacher.
Saammhmm:
Go with whatever text you prefer. Regardless of the average scores or how many students write on what,
someone has to get a 10, and there's no reason why you can't if you're prepared to put the work in. Since Ransom is in its 4th year, there will likely be some tricky prompts. Henry is only in its 3rd, but writing on Shakespeare is an acquired skill. Having done it in previous years puts you in good stead to deal with whatever they throw at you, so don't be too concerned with what the rest of the state chooses.
HHD:
There's an excellent blog post on the VCE Study Guides page on this topic here:
http://www.vcestudyguides.com/how-to-avoid-retelling-the-storyOther than that, constantly reminding yourself not to retell the story is a good way to go about it :p Now that you know what you're doing wrong, make a conscious effort to analyse. You can safely assume your assessor has read the text, so minimise time spent recounting or contextualising events. It's enough to say 'After X argues with Y, their relationship dynamic changes...' rather than delving into the lead up to the event.
#J.Procrastinator
Check out the context examples directory in my sig, there's heaps of stuff there to kick start your ideas. You can use song lyrics, but it can come off as a bit hackneyed or cliche, it depends on the song I suppose.
No, you do not have to use the text in each paragraph. In fact, I'd recommend having at least one or two dealing with other ideas. UNLESS your teacher wants you to use it, in which case, that's what you should do for your SAC. But for the exam, no, there's no requirement about constantly harking back to the text. Try to use it to propel yourself into more interesting territory- that's what the external examples are for.