I guess I posted without finishing the whole thread.
Took a quick look at your
MGMAT diagnostic. While I am no expert I will share with you what I know. Any area where you are scoring below 50% is considered a weakness. You should revisit those chapters of the
MGMAT books (or whatever source you are using). Your goal should be to be able to answer all the 300-500 level questions with 100% accuracy.
SC looks pretty good and for the time being is a strength... Spend time getting through the CR and RC books. Skip the foundations of verbal book as that is mostly grammar focused from what I have seen. However, for quant make sure you go through it. I found it helpful. I would read the foundations chapter first, do their in action problems and then move on the same chapter on their strategy guide. The fundamentals allowed me to build upon what the strategy guide was teaching.