If you are looking for a 700+ score, I guess Kaplan Advanced is one of the most important books for sentence correction. They have two sections , each explaining eight types of problems. The first section had stuff which I was more or less acquainted with but the second section had really arcane stuff like the sunjunctive tense which I had heard of only because I had taken French classes.
It’s rarely used in English but is important in languages like Spanish and French. Apparently, the French have lot of desires, wishes and hypothetical situations. I also came across “the gerund” in English which I had heard of only in Spanish. The gerund was in Sahil’s notes and I think that just mugging up those notes is a real good idea.