Well, it appears that most of the opportunity will come from the verbal section. Books to use include the Powerscore Cr
Bible and the Manhattan SC guide. For RC, incorporate some LSAT passages. And don't become passive while studying verbal. Read and re-read the books in order to be very familiar with all the concepts. Also, fully read every explanation - even for the questions that you answer correctly.
Your score is already quite high for quant, so perhaps use the GMATClub tests
. These 25 tests will help to improve your performance in this section.
You really need to mimic test conditions as closely as possible (AWA, time limits, etc.). Otherwise, you end up with inadequate test preparation - an a lower test score.