Judging from your previous mock scores, it looks like you'll end up with a pretty good score in the end.
Now, what you should spend your last days on depends a little on you and what you've found difficult. For example, I found reading comprehension to be quite difficult to get into if I hadn't done it in a while, and would have to do a few RC questions <24h before my mocks to "get back into the swing of things". Now, studying the day before the exam is not really recommended but if you have an area with similar struggles, it may help to do just a few easy questions. This is in part to get back into the mindset you need during the exam, and in part to give your confidence a little boost.
You may wish to do another mock test before the exam. I did my last mock 2 days before, and I'd say it helps to have the experience fresh in your memory, so there are no surprises. In short, you want there to be as few distractions as possible. For instance, if your last mock was around a week before the exam, you may get thrown off on exam day by seeing things that aren't completely familiar, be it a question type you haven't seen in a while, or just the user interface.
Also, to further limit the number of possible distractions, try to plan your exam day out in advance. Know your entire route to the exam hall, and make sure you can get there well in advance. In addition, it may help to make a list of every single thing you need to bring to the exam hall, so you won't have to worry about forgetting something.
Hope something out of this was helpful, and good luck on exam day!