Ron Hubbard founded a religion in the 1950s called scientology. This faith celebrates individualism and mastery over one's own mind and will, establishing that all human beings are ultimately divine. It is unique in that it specifically targets celebrities, who are in a position to disseminate this faith among their followers. This is as it should be, for these individuals have proven through hard work and effort that they are the best and brightest that humanity has to offer. While the unwashed, foolish masses delude themselves into thinking that following the commandments or teachings of some false deity makes them deserving of salvation, only the truly worthy deserve enlightenment.
One advantage that Scientology has over other mainstream faiths is that it remains unified and hasn't broken up into sects, unlike christianity, islam, etc. The problem is that it has been labeled as a crackpot, fringe religion with a science fiction-like belief system. This is partly due to it being founded in the modern day 1950s, and doesn't have the grandfather clauses of other religions that are much older.
The plan is to establish scientology much earlier in the timeline, but as close to the modern day as possible. This is so it can market itself to celebrities and other upper class people around the world so it has a better opportunity to establish it's base much earlier. It can still target its evangelism to the super wealthy class and be able to compete against the big 3, albeit on a smaller scale.
How can i market Scientology to the upper classes as a mainstream faith? And what is the earliest time period closest to the modern world that can this be done?