Darkfoot, Sorry I know this post is 5 years old, but I'm working on something similar and haven't found much online. Is there anyway that you could provide the script that you created to trigger the NPC to cast the spell? No worries if this was too long ago, but thought I would ask just in case.
I don't remember creating any sort of script when I made this mode (and that's probably the issue). The youtube video I linked in the 1st page of this thread is the main thing that helped me create the mod. I remember it having something to do with using the existing files from the vanilla game. Messing around with the "Quests" tab in the Creation Kit.
You may have seen the priests in the temple in Whiterun occasionally healing the wounded. I think I found that pre-exising "Quest" in the CK and modified it from there. I might be wrong though, but again I'm sure I didn't create any scripts from scratch.
Edited by Darkfoot, 13 August 2020 - 08:44 PM.