priest mage as communion master

[WraithLord]

I had a strange thing happen to me in an MP game. Not for the first time...

So, I have a host of communion slaves and two theurgs that lead the communion as masters. They lead a large Pythium army vs a host of fire blessed vans.
As the battle progresses they start to cast only fanaticism.
They are quickened so they cast four times fantaisicm round after round after round.
Naturally they get the slaves to nearly die from exhaustion while wasting many opprutinities to cast useful spells.
Unless I misunderstand something, fantisicsm effects all the soldiers so casting it four times in the same battle round is equivalent to casting it only once.
This specific battle Pythium lost. I count this behavior as one of the factors.

I want to know if other people experienced something similar.
Also, if indeed this is not supposed to work that way, it seems like it can be easily fixed.