This sort of problem is susceptible to the red queen's race -- if you solve it, that just means that lots of people will copy you, and you will find yourself in competition with a new crop of viral religions. You don't make much long-term progress by being innovative, so perhaps your best bet is to copy some moderately successful cults and hope that power won't corrupt you. The Hare Krishnas are a good template -- just avoid the racketeering, mail fraud, murder, and child abuse, and you should do fine.