From my personal experience, I recommend the
MGMAT series, but it depends on which style you prefer. If you have both of the books, try reading a chapter from each & see which one you prefer. I would not recommend reading both books from front to back because they may differ in strategies.
If you haven't purchased the books, I recommend you look at the powerscore books for SC & CR. If you want a score above 750+, the lsat powerscores books will help. I prefer the powerscore books over the
mgmat series. I wish I found them earlier.