The SpellMod changes priest and spell restrictions.
Improve and continue restrictions
The improve and continue restrictions for priests are removed. There is no option to keep those restrictions in place.
Specific faith restrictions
The specific faith restrictions like paving or mining are removed if the option
removePriestRestrictions is not set to false.
A priest has access to all spells if the option
allowAllSpells is not set false.
A priest has access to all spells of its light if the option
allowLightSpells is not set to false.
Favor costs for spells can be limited to the the value of
favorLimit. Setting a favorLimit of 90 will limit the favor cost of spells like lifetransfer to 90 and makes it castable without linking.
The praying delay of 20 minutes can be removed with the option
noPrayerDelay. The limit of 5 prayers per day can be removed with the option