It's been years since I took the DAT at this point, but what I hear from incoming D1s, the DAT Destroyers have stood the test of time as one of the best resources out there to get you ready for the DAT. My holy trinity for the exam was the DAT Destroyer + Math Destroyer + Dynamite Biology Review for the sciences and math. They really made the exam a breeze for me and helped me learn the concepts needed to do well without just memorizing answers. If you think a course would be helpful for you, I've heard great things about Dr. Romano's classes, but I can't speak to them in great detail because I didn't personally attend.
PAT materials have changed since I took the exam, so I can't comment too well on those. But for RC, highly recommend practicing with GRE reading comprehension exams for free online. Most of the time they're harder than what you'd see on the DAT, and I feel like they really prepared me well.
Hope this helps some! Best of luck! 🙂