I don't know if I could rank the founder belief system since you get to choose them and they're all situational. I generally use my religion to cover up a weakness, like if my tradition capital is small and I get an early religion, I grab the one that gives lump sums of food and culture. If my faith output is meh and I only plan on converting about 20 cities and would prefer having bonuses throughout the game instead of right now, I pick the way of transcendance. And if I get a really early religion and someone else nearby seems like they won't get it I'll grab council of elders. My favorite is still way of transcendance. Every era you get a free tech, a free wonder and 2 free pop in your capital. Since I love dashing through the eras it leaves the AI even further behind in the dust.