Order of CAT Practice Exams

no that's too many GMATPreps save them toward the end of your calendar maybe 3 weeks before then 1.5 weeks before - then I'd repeat it as many times as you can handle. But your first two tries will give you an accurate representation of what you will score after that you are getting the benefit of doing good practice questions but not an accurate score.

So.

Veritas
Club Challenges
MGMAT
800score (quant only if you need extra help, don't worry about the scoring)
GMATPrep

Make sure you give yourself enough time with GMATPrep cut out the 800score test first and maybe 1-2 of the MGMATs if you are getting close to test day. GMATPrep is your friend, use it wisely then often.

thanks for the response lsu,
would you recommend doing one or two exams a week? between now and week 3?

This depends on how you are scoring. If you feel that the reason your score is "where it is" because you are missing problems and you need to review material then 1 a week should be fine, this will give you time to learn some stuff in between test. If you are not getting to the finish line in time or you feel rushed I'd do 2 a week if you can because pacing is very important and being able to sit down and take the test on gameday without worrying about how much time you spend on each question will definitely net you some points.

I suggest if you go to more than 1 test a week that you tapper off as you approach the test day back down to 1 a week or do some half test if you need work in only verbal or math. Make sure you don't burn yourself out, you want test day to feel like a walk in the park but passing out during the test won't help you much.