Any insights for my improvement?

­I have taken 3 official GMAT practice tests so far - each of them 2 weeks apart. First test with no prep for baselining - 585, Second test with some prep - 655, Third test - exact same score of 655. Even on individual sections(Q-86,V-81,DI-80). Between second and third test, I tried to mainly improve on Verbal but with no luck. I feel like I am plateauing and need some help to break through that. My goal is to get 715-745 score.

Posting here if anyone has advice to improve on my gaps. I would greatly appreciate any insights. I see 2 main problems with me:

1 - I not confident on my answers on Verbal, especially RC (56th precentile), but even CR I not able to get it right with full confidence. Looking for advice to improve RC and reading speed.
2 - On Data insights, I am usually right, but I am slow and run out of time. I didn't have time for ~6 questions. I started guessing randomly from Q14 just to finish, I had time for the last one to get it right. Secondly, multi-part analysis always trips me (Q4/Q5). Especially the non-Math related ones.

Data insights: Math related - 86th percentile; Non-Math related - 66th percentile. Multi-source reasoning - 58th percentile

Verbal Reasoning: RC (58th percentile), CR (88th percentile). Identify stated idea (14th percentile)
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Quants: Nothing much interesting. 2 silly mistakes tripped me. Others were right.
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