How to improve GMAT score from 690 (V34, Q49) to 760+

Hi,

I have given my GMAT official exam on 3 Aug and scored 690 (V34, Q49) and I am pretty disappointed with my score. I am now planning to go for a re-take and am targeting 760+. I understand that I need to increase my Verbal score to at least 40-42 in order to reach 760+ and need guidance for the same.

I prepared for 3.5 months before my exam and used following resources for studying -
Quant - OG 2018, Jamboree (a local institute) Course material
Verbal - OG 2018, Manhattan SC Guide, PowerScore CR Bible - I read both SC Guide & PowerScore CR once, made my own concise notes, revised them more than 3-4 times and also referred them during practice
I solved 5 GMATPrep tests and my score were in the range of 710-750 (Quant score 50/51, Verbal score between 35-40).

My key challenges in Verbal section are:
i) I miss application of a known issue due to time pressure,
ii) Some times, there are idioms/ word combinations that I haven't seen before,
iii) If sentence is too wordy/ complex, it gets difficult for me to find the mistake in meaning.
I am not sure how to ensure my progress in verbal. So far, I am planning to solve OG again with more emphasis on analysing every question and solve more high level questions with timer available on GMATClub. And keep practicing till I achieve 85-90% accuracy on a consistent basis.

Please suggest how should I focus my study and are there any specific resources that I should use.

Thanks