Jumping from ~80th percentile to ~92nd percentile is a big jump - some people could do that in 2 weeks but most people would need more time. I know it's "only" 2 points and doesn't sound like much, but there's a big difference between 80th and 92nd percentile.
In terms of specific content areas, himanshu is right that we would need actual data on your strengths and weaknesses. If you've been taking MGMAT CATs, you can use the below article to analyze your results:
http://www.manhattangmat.com/blog/index ... ice-tests/If you do have any timing problems at all, this article will help:
http://www.manhattangmat.com/blog/index ... anagement/Note: you can finish a section on time and yet still have timing problems. Do the analysis described in the first article to see whether you have any timing problems.
You're at the level in quant where you might benefit from our Advanced Quant book (designed for people at about your current level who want to get to 90+). I recommend at least 3 weeks (ideally longer) to do that book. It isn't just telling you "here's what to memorize" - it's really giving you new techniques and new ways of thinking through problems and learning how to get better. You're going to want to apply those lessons to other problems outside of the book as well, so it takes some time to do that properly.