33% on your first pass means your foundation is weak -- you need to understand the concepts while hammering in the details. The good thing is 4 months is plenty of time to get that UWorld % up.
I personally really like Boards and Beyond lectures for understanding concepts. It might also benefit you to do flashcards like Bro's so you can really get through FA and Pathoma actively, rather than passively reading/watching/listening. If you did 100 new cards a day doing the subjects you're watching on B&B/Pathoma, you could do ~9,800 Bro's cards in around 3 months (6,500 Pathoma/FA path + 3,300 FA cards without micro/biochem). Use SketchyMicro + SketchyPharm. Kaplan or Boards and Beyond for biochem. About 2 months out, you could ease into your second pass of UWorld again.
This is what I would do.