The decision tree works, problem is the bulk of the questions are going to be "outcome" questions, not Maslow or ABC.
Towards the end of my NCLEX studying, I found myself using the tree less and less. I had a better sense of what the answers were because of the way the questions/answers were presented. With that said, I did over 5000 questions (all of Kaplan's QBank, question trainers, diagnostic, and readiness tests plus 1100 questions from UWorld + the self-assessment), reviewed each one right and wrong, and ensured I understood the rationales. I did content review when I wasn't familiar with subject matter and took ~30 pages of notes. Passed last week with 75.