You can read my experience for my successful attempt second time.
I will give you two tips.
1. Looks like you are improving but your reading speed is slow. That means you should improve reading fast and spend only about 1 minutes per question. In my case what I found that I usually took 140 minutes for first 100 questions and remaining 100 minutes for 100 question with about same number of correct answers. So, in actual exam when I had 100 minutes remaining with 100 questions, I did not panic because I knew I can do it. This may not be true for you but you should look for pattern of your behavior and create strategy that is good just for you.
2. Second, take as many as Mock exams. In my case I took 2 for first attempt and 8 for second attempt with maximum gap of 4-5 days between any exam. For whole last week, in was only thinking about exam with no distractions no phone call, no TV. Whatever free time I had I spent in studying in any way (weak area, definition, problems...etc.). Lot of people say not to study on last day. In may case this was opposite because as soon as I do something else, my depletion starts and after 3-4 days if I don't study I could lose lot of good knowledge. So my advice is to immerse yourself into study and exam for this week.
Good luck!