Your MCAT score is lower than the median for more than 2/3 of your list. Additionally, you should move at least UCSF, Duke, and Mayo to High Reach (and perhaps UCSD too), and move Dartmouth to Low Reach, leaving you with very few targets or safeties. At 23 schools, you're in a good range for number, but considering you don't want to add more schools, you need to remove some High Reaches and add many more targets.