CAMANISHPARMAR Thanks !
I took 4 mocks spaced with 3 day intervals, This is ~how it went - M1 *** M2 *** M3 *** M4 *** GMAT.
M1 (650) and M2 (660) were the free Manhattan and Veritas mocks. M3 (710) and M4 (690) were the free GMAT official mocks. The way i tightly spaced my mocks were out of pressure. Many might suggest that it is not ideal to take so many mocks in a short time, since you don't considerably improve within 2 weeks. On a side-note, 3P mocks were definitely harder than the GMAT Prep mocks. And yes, i do suggest not doing any mocks (Or even any prep) in the last 2 days, to avoid mental fatigue.
Regarding the SC strategy, I highly recommend Jamboree (Faculty - Srivatsan) to practically learn these strategies. Not really trying to market Jamboree, Just my personal opinion . Strategies like:
1) Learning to eliminate answer options by scanning vertically, horizontally, using the famous 2-3 split method etc. This is mostly common sense, but the emphasis on "approach" should be there when you're practicing.
2) Before reading the full sentence, Look at the common places where errors are found: After the Comma, right before the comma, towards the end of the sentence.
3) Taking calculated risks when in doubt: Prefer active to passive, Idiomatic preferences, ALWAYS prefer the simpler sentence.
I've not gone through a lot of material to draw comparisons, But i have gone through the SC grail. Although it was comprehensive, I felt that would've been a waste of time relatively in my case. I still suggest it for those who don't have access to Jamboree.