I'll get to judging bios tomorrow.

@Grey: That's basically how theurgy works, yes.

1. That's it pretty much.
2. Roughly, yes. Simpler because onmyouji didn't devise the process to compensate for poor quality mana and all, but roughly similar.
3. As long as it's manual it works.
4. Writing is "man-made" and therefore doesn't work.
5. That works, though it wouldn't be as good as a full ritual. Blood would be the most potent in that case.