Sir Whiskers
First Post
Unless you are in a campaign that has house-ruled this, the cleric can only prepare one domain spell at each level. This means that additional domains have diminishing returns - who cares if the character has a dozen spells to choose from if he can only prepare one each day? There's a slight increase in flexibility, but not a lot.
For this reason, the domain ability is the most important consideration in allowing additional domains - if a GM doesn't feel those abilities are worth more than one feat, then allowing additional domains for a feat is reasonable. I would be very careful about this, however, as some domains have outstanding abilities worth more than I would allow for a stand-alone feat. A couple examples:
Mysticism (DotF): "You apply your Charisma modifier (if positive) as a bonus on all saving throws. If you already have this ability (for example, you are a paladin), you add +1 to the bonus.
Celerity (DotF): "+2 enhancement bonus to Dexterity, speed increased 10 ft. when in light armor, +2 enhancement bonus on initiative. These are supernatural abilities."
Just my two cents'.
For this reason, the domain ability is the most important consideration in allowing additional domains - if a GM doesn't feel those abilities are worth more than one feat, then allowing additional domains for a feat is reasonable. I would be very careful about this, however, as some domains have outstanding abilities worth more than I would allow for a stand-alone feat. A couple examples:
Mysticism (DotF): "You apply your Charisma modifier (if positive) as a bonus on all saving throws. If you already have this ability (for example, you are a paladin), you add +1 to the bonus.
Celerity (DotF): "+2 enhancement bonus to Dexterity, speed increased 10 ft. when in light armor, +2 enhancement bonus on initiative. These are supernatural abilities."
Just my two cents'.