I just passed PMP with 3 ATs and my only resource outside of PMBOK 6, PMBOK 7 and Agile practice guide was PM PrepCast.
My formula for success were the following:
1. Listen to PM Prepcast Videos
2. Review the PMP Formulas that I purchased from Prepcast
3. Follow the learning path describe in PrepCast
4. Once all the learning is completed, please go through the quiz and review it.
5. I did not spend a single minute outside of PMP simulator after my learning was completed.