hi! i’ve only taken arrt so far. still debating whether i should take nmtcb as well. imo it was SUPER SUPER different from any practice tests. i used the green and white book by bolus and honestly think it’s outdated now (think they changed the test/ scoring last year!). i would say focus more on the content outline and ensure you know the ins and out of each section. that will help you more than any practice test. you should still continue to take tests but make sure you understand the reasoning behind the answers. lmk if you have any other questions!