Strategy advice badly needed! Stuck at ~640, 1.5 months left to study

Hi,

So I'm going in for my 2nd attempt at the GMAT on December 30th, I didn't devote the time necessary to study the first time which was monumentally stupid, but either way this time I really am aiming for a 700/710. I spent the last ~2 months redoing my "foundations" in Math & Verbal, but based on my CATs it seems to me like my biggest problem is timing. Especially on IR & Quant.

Quant:
- Timing is my biggest issue: I always seem to spend too long trying to get everything right in the beginning & then as I speed it up after the first 5 minutes, I botch a line of questions, then start getting 500-600 questions which is discouraging as I know I'm doing badly, and then it's just like a rollercoaster of timing messups of not being able to spend time to finish ones I know I can do, and not abandoning truly hard ones that I'm clueless on because I really want to move into the 700 level questions.
- Content/Types: I am still missing some exponents & roots, algebra, quadratics questions - I'm going to work this week on drills on this. I can't keep getting 500-600 level questions on these things wrong . On everything else, I find that it's not a knowledge issue, but rather that I'm not able to get these questions right on the test (somewhat timing related, but also somewhat just not having seen enough of every type of problem to quickly recognize how to solve - but when I review them in practice, 70-80% of the time I can get them right on the first try. this is really frustrating - how can I get more of these right??

Verbal:
Timing: I actually don't tend to run out of time on verbal. I think I am a pretty quick reader so I tend to make up for time spend deliberating over SC questions in the RC. I am not so fabulous at grammar but have a really good ear.
- Content/Types:My verbal score is ok, but the challenging thing for me here is that unlike Quant - I don't really know what to work on. When I review the questions, I have a hard time categorizing the types of mistakes I'm making on verbal. I think if I had a more "systematic" way of understanding why I'm missing the ones I am on Verbal, I could get the boost here that I need. Any suggestions there?

IR:
I only just started taking the IR section on my test this morning, so I'm sure I'll improve some. But my gut-reaction is, I didn't have enough time to thoroughly answer anything! 12 "questions" in 30 minutes, and each one is 5-10 minutes of work easily! How do you guys recommend the timing piece there? My guess is practice makes perfect, but I have such an uphill battle to climb already with my Quant score, I'm trying to think of a way to get the most bang for my buck in terms of spending time improving IR - but only enough to not raise an eyebrow to the admissions committee.

Date Verbal %ile Quant %ile IR Score %ile

10.24 36 81% 37 40% n/a 610 64%
10.31 36 81% 42 51% n/a 640 72%
11.15 37 83% 39 43% 0 630 71%

Overall, I have a month and half left to go here, my plan is to take 6 more tests before the real thing and work during the week to fix my problem areas in the meantime. I work full time, so am spending about 2-3 hours max on weekdays, and then Saturday/Sunday about 5-10 hours depending on how that day goes (with Sunday mornings being practice test day).

Would love the GMATClub's input on how I can make a 700/710 on the GMAT. Any help would be greatly appreciated!!