Yes EA has riruals that involve blasphemy as a larger subject as well. Blasphemy is not just reciting a psalm backwards, there are a few ways including burning the Bible… I would say you still have to have a reason and intentfor doing it otherwise it’s a waste of time. You don’t do this for its own sake, it doesn’t bring power it’s meant to cut ties with the Christian gods. It’s not an act of worship but the opposite.
As such, there’s still no list of “shoulds” for what you have to do to achieve your goal, whatever that is (I’m not sure you said).
Try the search for the keywords blasphemy and blasphemous, we have a bit about that. Connor Kendal has a whole involved tutorial you might like: