If you are alluding to Kaplan scores for consistence, you may find none other than those scores are generally low. I know many 700+ scorers(read the "end of an era" sticky) who had scores which varied from the 500's to 700 on Kaplan CATs. Even my PR scores varied from 650 to 720 in the 2005 versions. I think PP and Paper tests are the most accurate gauge: My Paper tests(9 of them) varied from 680 to 780 so although there is a large variation, it gave me the confidence that I could score over 700.
As for AWA, I actually find the argument part easier than the issue part simply because of the many CR I had been through. By doing many CR questions, you will develop a critical thinking process that will tear the argument apart before even looking at the answer choices. Usually, the AWA argument is much easier than many CR questions because it leaves open room for you to tear it down. If you have trouble with AWA argument, then keep doing CR.