I'm pretty sure you can refresh your NPC, but going /rdm yourself would kind of remove the need for your NPC as a healer.
Additionally, the NPCs do not benefit from your Samba effects, even though they occupy one party slot and act like a party member for some other things. If they could have gained mp from aspir samba, perhaps things would have been a tiny bit better.
What we really need though, is to be able to tell the NPC to spend theirMP very carefully when they are below 50% mp. Because of the poor performance of the NPCs, you can rarely rely on their cures as your main source of healing, and should often bring your own means of curing, making backup healing the thing they would be good for. However, this doesn't work either when the NPC spends all their MP on debuffs instead of saving enough for a pair of Cure Vs when you drop below 33% hp.
I suspect that even if the NPC did use refresh on themselves, or if you refreshed them, they would still keep spending all that regained MP as soon as they could, leading to them still being below the 88 mp required for a Cure IV almost all the time.
