BLM and SMN are not healers. They do not have the magic skill for it. I would even go so far as to say without propper set up, RDM isn't either. That being said, I keep myself alive if I have to, but it's such a waste of MP I don't like doing it and won't for others in the PT. You want a healer, get a healer. Don't ask me to waste my MP.