1. This isn't the subforum to pitch ideas for others to write; it's for sharing ideas that you're working on yourself.
2. Taint is a biochemical thing, not a spiritual/metaphysical thing like corruption in CoC2. As such, anything short of biochemical manipulation isn't going to remove it; that's part of what Steele's microsurgeons are for (-1 Taint every 3rd day after Steele's most recent Taint gain).
3. Steele is almost certainly not a space-Christian, for the following reasons:
- Lack of discrimination against galotians, rahn and other protein-feeders (which the Church of the One God claims are physical demons sent to tempt believers)
- Doesn't seem to follow any dietary laws whatsoever, which would naturally preclude following whichever ones the Church has set in place
- Generally mod-happy despite the Church's negative stance on genetic modification, and is surprised at finding a believer who goes against that (Walt)
- Has no qualms about promiscuity, polyamory and open relationships, and the Church is presumably as monogamy-positive as ever (especially given the above discrimination, which is mentioned in relation to galotian's disastrous effects on monogamy)
- One of the possible Tavros Extrameet matches (SavingGrace) attempts to convert Steele to the Church, which Steele buggers the hell out of
As such, going to church is highly inappropriate for them to do.
4. There's already a quest involving Darnock vs the natives of Mhen'ga (specifically, the zil) where Steele can pick sides. Besides, I'm pretty sure his religious motivations are mainly there for background fluff and maximum parallels with post-medieval European colonialism rather than as the centrepiece of his story.