HELP NEEDED! Advice on how to improve my GMAT Score

Hi,

I am currently in the prep phase with a goal to have the exam by the middle of December (no date booked yet). My target score is between 700-710.
I have not finished brushing up on all the concepts yet, but I follow the Manhattan books for the concepts and the OG for the questions. (Still have a couple of topics like number properties and geometry left over in quant, and some in Sentence correction).

From the First CAT to the second (5 weeks apart), I improved my quant score from 30 to 40, however I seem to have reduced my verbal score from 33 to 27, which ultimately only led to a 20 point increase from 530 to 550.
I am looking for some tips in quant to move over the 40 mark to near a 47-48 mark. Any tips on material or strategies that I can follow will be appreciated. When it comes to verbal, while solving the OG questions (now on the Hard category), I get most of the RC and the CR questions right, however during the mock, I got a lot of these wrong. I am not sure if it's because I was overly stressed out since I was a bit focused on the quant and how I had the last couple of questions easy and was thinking about that score or not. But I would really like some tips here since I am used to having atlas a 70% correct rate. Sentence correct is another story! It seems on the mock that I got most of my sentence corrects correct but I know that it is my weakness, compared to CR and RC. I am trying to play to my strengths, but it looks like that didn't work today.

I am a list disappointed and would really just appreciate some support and ideas on how to bridge the gap between a 550 to a 700.

Thank you all so much!
/C