yeah when it really comes down to it, with your context and text response you are just cutting and pasting appropriate ideas and arguments from past essays you have done.
I've begun doing this with a text response, for my text i've basically narrowed it down to about 5 different types of topics; then planned my arguments and examples for each one. For my context i've basically got a list of about 6 or 7 broad ideas each with examples which can be used in an expository.
But your lang analysis is the one where you have to really analyse and draw your own conclusions, make your own decisions etc. which is why i tend to do it first. get a plan in my head using the 10 minutes and try to grind it out in 40-50 minutes