I do not know whether I am in a position to advice you, I had a similar kind of situation. I had to make my way from low 80'S in part1 to low 90's. I realized that the following things helped me, try to associate your self with people who got a 90 and listen their ways they followed and u dont have to do exactly what they did, but you can adapt it to your situation. Next look back and do an introspection through the whole process of your preparation right from the material you have selected till the day before the exam, write down the things that you donot want to repeat. As you have read the entire material now try to be selective and spend more time on the most important topics(you will know these topics better by working with the released asda papers). Identify the material that has helpled you the most and identify the material that you spend more time but was not so useful or where the yield was low. Since your time is limited before you start the preparation determine clearly what topics you want to read and what resources you want to use. Do not keep changing these. Most important do not get carried away by people who say a particular resource or particular topic needs more stress when you are more than half way through. Believe in yourself and what you do and you will defnetly get a score in 90's. Use this information only if you really feel it works. This is my experience and it worked for me. Adapt this to your situation. Good luck with your preparation.
NEVER NEVER NEVER NEVER NEVER NEVER NEVER GIVE UP
