Congratulations on your great score.
These are my weaknesses -
1) In maths, I'm stuck at 49, and I am not able to raise my score to 50+You have the basics - I am sure you just have a weak spot that you keep missing questions in that area or areas. Try to have a error log (you can find it in the forum) and after you have enough mistakes - you will be able to notice patters.
2) Like you, I am extremely weak in RC. I get about 7/10 correct in SC, 6/10 correct in CR, but I get only 4/10 correct in RC.4/10 is something you should work on. I would try to change strategy. Are you reading the full passage? or you only read "strategically". I tried both and I could solve with "normal" results - only after reading all the passage.
3) Another problem is time management. When I reach 32nd problem in mjath, remaining time is nearly 1-2 mins. Similarly when I reach 34th question in verbal, remaining time is nearly 1-2 mins.Why? Is it because you do not read fast enough? or is it because you waste too much time for each question? I had no problem of timing in the verbal part. Just make sure not to waste too much time on one question. As I said above - the long way is the shorter way. Make sure you dont read the questions too quickly so you are not fully understanding what you just read. Read slow so you can get all the info in the 1st reading. Even if it looks longer - its actually the shorter way to do it. (at least for me).
750 is like a dream for me, but I get myself motivated from success stories like your's.
Just keep studying. Stay motivated. Work and learn from your mistakes. And I am sure you will be just fine. good luck.