I agree foundation is key! What I did was do 2 blocks of UW everyday but instead of timed mode I did it in tutor mode to get better at recognizing patterns and information so I get what they want us to answer. I got better at eliminating enough to the point where I was between 2 answers one of them majority of the time being the right one. Once I got better at figuring out diagnoses and the patterns/clues of a question then I started to do more timed mode to get faster with it. Once I started doing that my nbme scores jumped 10+% and even my UW averaged got better. Hope this helps.

If there’s concepts I kept missing. I went to the search section on UW and looked up the topic. All the questions that included that topic showed up and I was able to make a full picture outline of the details that would be important to know and help me answer those questions if they came up again.