I'm sorry, but your text doesn't make sense. Read real traditionalists like Julius Evola and not some XX century retards from random occultist cult.

Esoterism means higher metaphysical part of tradition. Exoterism is the dogmatic tradition, like today's abrahamic religions.
So "esoteric practice" doesn't mean anything.

>by many means, some of them purely mental, some of them physical.
That's the retardation that brought all of the occultist sects of the XX century. Metaphysic is about spirituality, about your ontological part, your spirit.
So there is nothing about mental, nothing about practical science, nothing about material. The XX century sects wanted to rationalise metaphysic, rationalise inexplicable event with modern physics (neo-spiritualism).

>inventing technology is the final step of the alchemist's path
Absolutly not. Technology, or practical materialistic science, is only a very little and irrelevant part of superior spiritual science (science meaning knowledge). Chemistry is only the practical part of alchemy. Certainly not its evolution. And near the real truth that hold alchemy, it's irrelevant.

>it can be used to create a new caste system where those who are at the edge of technological advancement virtually become a seperate species.
Truly doesn't mean shit. Modernism, and its ultra materialist consequence like industrialisation and technology is the mere symbol of degeneracy and obscurantism, the ultimate losse of the primordial truth.

Never ever has our time been in such obscurantism and ignorance. That's why we're at the end of the world, in the Age of Kali, or Kali Uga.