All Beliefs are Welcome Here!
He needs to see a doctor and be placed under watch if he's considering ending it. Yes, prayers and magic can be a big help, but a matter as serious as depression and suicide should be handled in a worldly fashion as well.
I will keep him in my thoughts and will do a little spellwork, but urge him to seek professional help.
Good. Just remember that you can't force him to see a doc, but being there for him and nagging helps too. You'd be surprised how well nagging can work in this sort of matter.
Keep it up.