How do I plan an essay question on a poetry collection?

As you will know, an essay question on a collection of poems will require at least two poems to be mentioned - it will end up being a more comparative-style essay than GCSEs. Therefore, planning out a tight structure is crucial so that you don't over-analyse the language of the poetry and loose track of the question. For my A-Level, I came up with a plan that really helped with this:

First, read the question (it is generally on a common theme in the collection) - which side of the argument do you have the most evidence for? Write a quick sentence-long conclusion to help you keep a clear argument. Second, come up with two points for the side you are going to argue, one argument against, and one point to rebut the counter-argument (this approach tends to leave the maximum amount of time for crafting a strong line of argument and fulfilling all the marking criteria). Third, think back over all the poems you revised, which ones fit easily into your arguments. The A-Level rubric calls for five things: anaysis of language, the writer's methods, understanding of contexts, comparing accross literature, and different interpretations. Now you have your skeleton and the poems you will use, next, note down on your plan the short quotes you will use and remember to analyse language and methods. As you go, weave in any relevant contexts you have studied (e.g. the hypocrisy of Victoran society at the time of Oscar Wilde). Finally, begin to think about how you will pull all this into precise and strong introduction and conclusion, then start writing the essay!