Well I will tell you what I did… I started with PR 1296 in March, followed by Barron’s ACT 36, PR 6 ACT tests, Barron’s English, Reading and Writing workbook. Now I am giving mock tests from Red book, past papers and Barron’s 6 ACT tests.
What I can tell you is, Barron’s are quite hard compared to Red book. Princeton is somewhat difficult but comparable. So the best thing to do now, considering the time left, is giving tests from Red book and past sample papers.