Your goal is to figure out yourself (since you know which is more realistic) what to focus on - either the area you are most comfortable in and therefore can perfect even more or the weakest in and need the most work. I am not sure which one has a better ROI.
I would focus on your error log
and go through the questions/areas you made/make the most mistakes in.
Don't kill yourself with practice tests - use the time to study and polish weaker areas/fill gaps.
Here is something you may want to go through: share-things-you-wish-you-knew-about-gmat-win-119919.html
And here is a fun thing I found: the-oh-guide-to-the-last-week-before-gmat-67555.html
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