I am curious about the more concrete yet quite grandiose claims about an ideology that combines egalitarianism with vitality
and reconciles science, (most of) theology, and the whole history of philosophy
or, I'm very skeptical but I applaud your efforts
does it require this faith in the pursuit of cosmic oneness, or can the more immediate, worldly elements be separated from that?
Your last point has been a major concern: seeing if there is a way to extract the more recognizably practical elements from the larger metaphysical framework. I think it can, and it has to do with the reconciliation of egalitarianism and vitality.
As a point of departure, what do we think of a society with a class system, but those classes are not otherwise demographically skewed or biased? That is what I meant by equality across demographics (apart from economic), at the cost of equality across individuals.
Could that be a stepping stone toward real egalitarianism? A phase in a gradual, conservative process, rather than attempting to implement something more radically egalitarian immediately?
Part of the egalitarian/vital ideological synthesis
could involve a kind of brutal progressivism, which would view the dominator as greater, host to greater vitality, than the dominated - but even greater, even
more vital than the dominator is the one who is able to distribute surplus vitality to the dominated. Nietzsche himself said that only great men can be kind, only I would make the point of not limiting it to men (even if one argues he meant human).
I think that could be one approach. Another approach to an ideology that is at once egalitarian and vital would involve a kind of selective privileging of various components of various ideologies - a superposition of ideologies. But that would take a ton more work to package into a more intuitive and appealing form.
edit: and as an aside, I currently intend to formulate the political dimensions of this cosmology so as to arrive at communism, which I think would be the best society to serve as a springboard for entering higher orders of intelligence.