guide is a must for a 650 -700+ score.
Aristotle prep is a condensed form of MGMAT SC
Study MGMAT SC
guide --> practice OG related problems at the end of each chapter. Complete SC guide then start with aristotle prep..
just google "how to prepare for GMAT sentence correction GMAT kolaveri" -- to know how to use MGMAT sc
I think that a better method of practicing questions from a particular topic is not to see the question numbers which test you on that particular concept. In Manhattan SC, it's given at the end of each chapter for OG) and in Aristotle SC, it is given at the end of the book for their 100 questions. Basically if you know a particular question tests you on parallelism, what else is there to actually do in the question. I rather suggest that after having done a particular concept, you should do some questions randomly BUT only find that particular concept in those questions.