Hi Olivia,
I have a paragraph structure for language analysis which really helped me simplify what I needed to do and make sure I spoke about what the examiners wanted.
I would start by reading the stimulus material 3 times: once for background info, once to pick specific argument/themes and once to pick out specific techniques/language. I would then write 3 - 4 paragraphs, with each paragraph focusing on a main argument. I would structure them as so:
Topic sentence (i.e. what is the argument) [~ 5%]
Techniques/Language (how does the author back up their argument?) [~ 35%]
Effect (What is the intended effect on the reader) [~ 60%]
That way you have a nice logical structure and you focus on where the most marks are.
I have a preference for talking about the language that is used, rather than a lot of techniques. I feel that discussing the language allows me to speak in more nuanced terms about the effect on the reader. So I don't recommend going into the exam, like a lot of people do, looking for categories that the author's techniques will fall into, I think that can often be a trap. What I recommend is closely analysing the words themselves, and how those words are intended to persuade the reader. Also it is worthwhile to remember that examiners put a lot of emphasis on tone and tonal shifts. So the bulk of your discussion of the language is how it affects the tone of the piece, and how that tone subsequently makes you feel about the author's argument.
So to distill the steps, just think: Argument, Tone, Effect.