Modding

Go to \GameMechanics\CreatureVisual\Creatures, rename Free cities to Haven, open the folder, rename the files wizard.xdb to Priest.xdb, Hurt_locker.xdb to Cleric.xdb, create a folder Renegates, move the file dark wizard.xdb there, and rename it to Zealot.xdb
now you can delete the Creature folder in the GameMechanics folder; it is no longer needed
in the MapObjects folder, change the name Free cities to Haven, delete the _(AdvMapObjectLink) folder, rename wizard.(AdvMapMonsterShared).xdb to Priest.(AdvMapMonsterShared).xdb, Hurt_locker.(AdvMapMonsterShared).xdb to Cleric.(AdvMapMonsterShared).xdb, open these files and change CREATURE_634 to CREATURE_PRIES, CREATURE_632 to CREATURE_CLERIC
create a folder Renegates and move the file dark wizard.(AdvMapMonsterShared).xdb there, rename it to Zealot.(AdvMapMonsterShared).xdb, change CREATURE_633 to CREATURE_ZEALOT
you can delete the scripts folder
optional
in \Cameras\Interface\HireCreatures, rename one of the files to Cleric.xdb and delete the rest