[Cohen]

Marignong have all around force.

Has crossbowmen, a wide range of infantry from cheaper (flagellants) to elite (man-at-arms ... not so much elite for 14 gold, but 14 gold should be elite troops) and cavalry. It seems an medieval army of mankind.
So you've more possibilities on battlefield.

Inquisitors couts double when preaching in a province with enemy domain.
And their mages aren't bad ...

You can combine the theme Fires of Faith with high scales, to aid you in preaching ...

Flagellants are difficult to rout and are holy so you can bless them.

This is a small overview ... I'm still learning to play Mary.