I have used the pamphlet of pantheons 3 times so far to develop a rock-solid, epic religion for various campaign settings. Each one is completely different, cohesive, and an absolute inspiration for both me and my players to jump off from.

It reads exceptionally well, and the way it's laid out makes sense, but also allows you to see/make connections you might not notice if you're just doodling on your own. It also tackles the other aspects of religion, such as how the people in the world see their gods, interact with them, worship them, etc.

If I could aggressively throw this at every single person trying to find a quick, easy, fun way to create a foundation for their world, I would. With glee. I can't recommend this enough.