keep doing what you're doing I guess. exam questions really are the way in maths (and most subjects for that matter)
what I always find useful, is doing a few full length papers, collating the marks in a spreadsheet by question and topic. You'll be able to see which topics you are constantly losing marks on. From that you can focus on doing targeted exam questions, there's no reason to keep practicing circle theorems if you are consistently getting high marks on those questions. Especially with one week to go the most important thing is focusing on weak spots.
For what it's worth you can 1000% get to a 6 especially if you were only 5 marks off. I've known people go from 5 to 9 in a week genuinely, (myself included)