This is something I advice everyone. For practice you should do the following:

1. OG 12

2. OG Verbal Guide 2nd edition

3. OG 11 (optional - you may pick only select questions:
https://www.crackverbal.com/blog/og-11th ... th-edition)

4. GMATPrep questions from the documents available online.

5. GMATPrep questions from forums such as BTG and ManhattanGMAT.

In all the above should provide you with atleast 500 or so questions PER question type i.e. SC, CR, and RC. That is more than enough for you to reinforce the relevant principles, and strategies.

HTH,

Arun

PS: As you can see I would recommend avoiding *all* non official question sources. Use those books/courses only to learn about techniques.