Latin Revision

If you have learnt everything else, I definitely think that learning what the cases look like would help a lot, but I would normally say that you don't need to know them off by heart- just as long as you have an idea of which case is which and how to translate them. I would not say the -ne words is necessarily a priority, but indirect commands with ut clauses can come up a lot.

It sounds obvious, but the best way to revise for Latin is to actually TRANSLATE passages as it tests all your skills at once(including how to use grammatical structures) and makes you remember vocabulary more effectively. If you haven't done all the cambridge Latin course books already, I would highly recommend going on the CSCP website as there are a lot of funny stories to translate, vocab to learn and exercises to test your knowledge on Latin grammar.
Also, if you are doing the literature exams as well, the CSCP website has an anthology of the set texts which is SO SO SO useful, especially the audio clips that they have for some of the texts.

Good luck! I hope this helps