I don’t know if your teachers have mentioned it but as an HSC marker I tell students not to memorise essays because the HSC is designed so stucents don’t rely on memory but analysis .Dw guys I never memorise essays and if you know a skeleton it should be good!!,
I also make sure that students are aware that we usually can decide your mark by reading your introduction so I encourage you to memorise an introduction and be ready to make a few changes that relate to your question but keeping the bulk of it .
if you would like more info from one English teacher‘s perspective or HSC markers feel free to send me a pm and I will follow up for you .
Good luck with the trials