Haven't read all this thread. But what would disturb me most strongly about a situation such as this "praying for you" lark is IMO there is a potential sub-text of proselytisation.

No knowledge about the case in question, and as it happens I do believe that faith healing, as well as positive vibes or whatever, can be genuinely beneficial. But I do loathe the way some religions go out of their way to make converts of the weak and vulnerable. It's a slippery slope from allowing members of secular professions to dabble in spiritual ministering, to allowing them to proselytise and seek out converts from those dependent upon them.

And what if the situation were a Nurse who also happened to be a Witch, were to offer to do a spell on behalf of a devout Catholic. Probably not a lot of difference in the the possible metaphysical equations.