An interesting mod, it could be better though. the spells could use some work, like for instance elemental spells to damage enemy troops AND there moral, like create a massive sigil in the sky that rains down fireballs/ice shards/lightning bolts onto the enemy damaging the enemy by 20+/- %

Or in regards to healing magic instead of just increasing moral it heals downed troops recovering about 10 or so % of your troops like lets say you started with 8k troops and got into a battle and lost 500 of them using the heal spell would recover 100+/- men back into your army and improve moral by a small amount as example.

Illusion magic can do alot more them what was shown on the mod page, in battle you could cast a spell that slashes the enemies attack/defence stat making them far easier to kill like Skyrims calm spell for instance or Frenzy make the enemy kill themselves by breaking off from the main army and start attacking the main army, they would be of a red colour and be called Frenzied troops this would last a few in game days and then wear off and the effected army would rejoin the main army if there were any left.

Or Fear, a portion of the enemy army routs and runs away similar to how shattered defeat works but not the whole enemy army just a small group of them break from the main army and run away for a time.

for the evil tempermented rulers you could have necromancy spell/s that raise all of the dead on the current battlefield of both sides and they would join the casters army until killed again. the resurrected troops would be slightly weaker then there alive counterparts but they would make excellent cannon fodder attacking and killing enemy troops in place of your live ones, reducing the odds of YOUR alive troops being killed by a % thus bolstering the strength of your army. best used when near defeat or many of the enemy lies dead of the battlefield to make future battles a bit easier.

using spells of any type but slightly less so for healing spells would upset the clergy because it's technically satanic to cast spells and the like in the first place. but for pagan rulers it would still be slightly frowned upon but not abhorred like the christians.