General GMAT Questions and Strategies | OG Study time vs. MGMAT Study Time

Hello,

I was curious as to if anyone had any advice on the amount of time I should spend reading MGMAT vs. practicing OG questions?

I want to get a 700+ (hopefully a 720-750), and am planning on spending 3 months studying 20 hours per week (which is a lot seeing as I have a fulltime job and a commute).

I figured I would have time to do both OG and MGMAT in the 3 months, but I was wondering if I should just study the MGMAT sections that I score poorly on during practice tests, and devote more
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