What is the most recommended plan when preparing for Critical Reasoning?
My current CR background:
I have read the Manhattan Guide to Critical Reasoning and have done the exercises for the main sections (BF, S/W, etc.). However, I have only noticed improvements in my question accuracy for 500-level questions. I have also noticed that 90% of the time, I don't understand the argument when reading it, and only after reading it 3 times do I have a strong grasp of the argument. However, by this time the 2 minutes recommended to answer the question have expired, and I don't have time to answer the question.
What am I doing wrong? I really don't know how to move on from here. My target score is a 750+ and CR is my weakest section. Thanks in advance!