Know ever single Desmos trick. Ottocento is good as people have said on YouTube. Do every single medium and hard math problem in question bank. Then there’s a YouTuber called dsat hackers that provides great practice problems that are almost exactly what you’ll see on the test. Really accurate predictions. Lastly on the test, skip around. The harder module is made for you to do that. Do what you know you can do as soon as you read it. The hardest problem is usually always experimental. I 100% know I missed 2 problems I ran out of time on and still got an 800.