How does the ai henchmen use prioritize scrolls I give them?

I’m not an arcane class, so I have been giving any I find to Deekin who seems to use them sporadically.

He often uses a mix of defensive and offensive ones; like if he has fireball he will use it or if I give him invisibility he will use that.

I do have him set to not go into close combat and to only use spells on moderate enemies, i am using the Ai henchmen mod off Steam workshop as well, but he doesn’t have an option to talk specifically about item usage in terms of magic items and scrolls.