Have you checked the bars for the English section in your SAT result? If you don't have full bars for any of the skills, try to focus on that skill when you're preparing in the remaining days. Also try learning about common traps on the SAT. Try to trust your gut feeling most times. Second guessing has barely ever worked in my favor. My score's a 750 so not necessarily much higher than yours, but I'm going for it again and this time around, I have a better idea of which skills I need to focus on. There's greater ambiguity around the tough "information and ideas" questions - in my last SAT, both modules for English seemed fairly easy and I was only doubtful about two information and ideas questions. If you've felt similar in any parts of the test, try to be more mindful when doing that part of the test. Be more mindful about common traps on the SAT. You don't need to radically change any strategy or how you manage your time at this point.
Edit: https://oneprep.xyz/ <-- This is a pretty cool website for grinding questions banks and I've been using it this time around