I can't remember the AoS essays too well ... but from what I do recall, a good way for practising AoS essays (any essay, really)
Make an essay plan.
A minimum of five arguments or points you want to make, then peel it back to three or four. In the time frame you have any more than four is asking for trouble because you won't be able to write as much as you want to.
Figure out for each 'point': (a) what it is, in a sentence (this will be your topic sentence AND part of your introduction, so make it clear and concise. If you don't know what to write it's time to go back to your notes and figure out what you are talking about.); (b) Justification - how it relates to your area of study; (c) Example(s).
Write them up in point form, brainstorm form, whatever works for you. Keep referring to your plan as you write your essay to make sure you keep on track and don't go waffling on about something else.
Decide what format is best
As you said, it's hard to decide between putting a text per paragraph or all texts in a paragraph. IMO which is simpler is up to you. It is probably commonly believed that being able to refer to multiple texts in a paragraph is a sign of ability but this is pretty doubtful - if you're going to ramble on about multiple texts you will probably lose sight of your argument.
It is a good idea to use comparative words like 'similarly' and 'however' between sentences or paragraphs.
You want about a paragraph per argument; if your paragraphs tend to be short, make that two paragraphs per argument (that's a minimum of six full sentences).
That should be enough to get you started, I hope. Practise will help you develop skills which allow you to write beyond two pages. A nice average is four to six pages, depending on your handwriting.
Oh, and one last thing: make sure you answer the question.
HTH.
