In my opinion, (thinking abt a power fantasy) the best ones probably are (legendary versions ofc) primordial, chaos, yin, yan, fire, wood and. There's the ice one too but i think that is the yin one. There isn't a "absolute one" bc there will probably have a lot of builds and styles of playing. Personally i really liked the heaven defying premise, we are unbound by the heavens, destiny and death, we have literally 9 lives that reset every fight and the heavens can't affect you in any way. It seems like the perfect root for a mc in a power fantasy like that. so basically it probably means that we can achieve godhood without obstacles since we aren't limited by the heavens and destiny.