[Gandalf Parker]

Spells that get used too much or too little tend to rely on things like this nation, this map size, these mods, early/mid/late game which makes a general change to the game for that purpose questionable.

BUT I have seen that in general, many of the "the crappy AI didnt do what I scripted" are often the use of Alteration (defensive) spells when Evocation (offensive) spells were scripted. Except for certain strategies involving specific spells, I find it helpful to not research Alteration until the point in the game where I might have magic-based thugs. This varies for everyone of course but researching Evoke ahead of Alter has saved me some frustration IMHO

So maybe looking at the spells in those two categories and comparing the priority might help.

Or, getting Johan to get the AI to maybe cast ONE Alteration spell instead of bunches (damn cowardly mages protecting themselves so much that they are worthless in the fight)