Need your insight

Hello,

Test Date - 10th Aug
Target score - 49-50 in quant
Earlier Score - 45 in real GMAT and 44-46 in five MGMATs , almost 80% accuracy in the OG (DS+PS)

My analysis === Weaker in Number properties, get hit hard with geometry, co-ordinate geometry, probability and combinations. Take longer with word problems when the question is tougher (but get it right mostly). I think I am bad at DS (mainly because of strategies)

Now, resources i have are
1) MGMAT guides and advanced mgmat and OG
2) GMAT club tests (have taken first five tests - get almost 27/28 right , felt demotivated and stopped taking )
3) Grockit
4) Knewton (do not think its much of use )
5) Kaplan Qbanks and Kaplan Premier ( should i get kaplan advanced edition)

My confusion

1) Should i start retaking GMATclub tests again ? or do you think that i should first work again on my basics and then start doing gmatclub tests ?
2) I feel pathetic with co-ordinate geometry and geometry (for prob and combi - i have bought the veritas guide, i think i will be good with it)
3) do i require to buy Jeff's Quant collections (advanced one, i think i have enough material for basics)

Can someone please help, i feel too much confused as to what to do ? I do not have much problems with the timings (may be because i have a few weak areas mentioned above, so whenever i get problem from that area, i get a sense in 45 seconds, and if i think i am unable to solve the same, i make a guess and move on)

I need special insight on one approach that i am following, is it really worth ?

Whenever i take a test, i analyse each and every question. While analyzing the questions , I keep two kind of problems aside and prepare collection of these two types

1) the questions i get wrong
2) The questions that i think has better explanations

I revise these questions from time to time, my apprehension is that am i learning with this approach ? or i am just mugging up the same problems ?. I mean do you think if i study the same problem twice/thrice, does it help ?

Thanks very much your help in advance