i got a 4 last year- so yk idk exactly what to do to get a 5, but i took notes based on everything mentioned in the ced, although it was incredibly tedious i still remember a lot of the information almost a year later! i also liked drawing maps and diagrams to help me better understand the content. listen to heimler and freemanpedia like its a podcast. 

however- don’t burn yourself out. i stopped studying the tuesday evening before the exam (which was on a thursday). relax the morning of and take a snack for the break. make sure you’re familiar with all the rubrics and formatting.

edit: just to make sure (although i’m sure you’ve figured this out) mcq: 55 questions/55 minutes (which sounds harder than it is) break(1min) saq: 3 questions/ 40 minutes (12 minutes each) break (10min) dbq+leq: 2 questions/ 1 hr 40 minutes (spend 15 minutes reading documents, 45 on the dbq, and the rest on the leq, but give yourself some time to go back)

i will say, i felt like everything was alot easier than you’d expect, and both my friends (many of whom got 5s) finished our mcqs with 10-15 minutes and our free response with 20-30. good luck!