i think your biggest mistake was not using DAT destroyer and math destroyer. People think its "overkill". these same people also tend to not do as well on the DAT. Are both materials time consuming and difficult? absolutely. however, if you're looking to get a high score, DAT destroyer and math destroyer are the silver bullet. if you retake and use these materials, you can get whatever score you want. good luck you can do this!
I have a friend who had both Destroyer books but opted for the 2000$ kaplan course. he did not do very well on the DAT and lost a bunch of money. he also did not use the $150 destroyer books he paid for. only you can determine the score you get, in the end its how you study. Use destroyer, i cant speak any higher of it. tried and proven material right here