Brown Jenkin said:
I should know better but do Mage Armor and Magic Vestment stack. One is an Armor Bonus the other an Enhancement bonus.
Yes they would stack. While there is an arguement to be made that it doesn't affect the Mage Armor spell there is no arguement that Magic Vestment can not affect clothing. So, they do stack unless you happen to be completely naked!
Mage Armor = +4 Armor bonues
Clothing = AC 0
Magic vestment (cast on cloths) = +1/4 levels enchancement bonues
Total AC bonus (assuming +1 from vestment) = +5
what you need to remember is that like bonuses do not normally stack. They over lap each other. You only add the greater of the like bonuses.
So if I have I have +1 leather armor and then cast magic vestment it would have no effect since the armor has already got a +1 or better enhancement bonus, the spells effect is still there you just don't get the benefit of it while wearing your +1 armor. In the case of a necklace that gives you a +3 enhancement bonus and you are wearing +1 leather it would have an effect. The net AC bonus (assuming dex 0) would be +5.
Let's complicate things a little.
Mage Armor gives a +4 armor bonus
Leather Armor gives a +2 armor bonus
enhancement on the leather armor gives a +1 enhancement bonues
Using the stacking rules you would get an AC bonus of +5. See how you take the +4 from mage armor? It overlaps the +2 from the leather armor, the +2 is still there you just are not recieving the bonus to your AC. while MA is in affect. You would do this with all the like ac bonuses. Just because the MA overlaps the leather armor doesn't make the +1 enhancment null and void. Since the enhancement bonus is not an armor bonues they can stack.
One of my characters has +5 padded armor, a ring of protection +5, bracers of armor +8, Amulet of Nat. Armor +5 for an AC bonus of +23. They all stack because they are different types of bonuses. (keep in mind I am not adding in the padded armor's armor bonus just the +5 enhancement bonues because I am already getting an armor bonus greater than what padded provides from the bracers).
If I didn't have the armor I could get magic vestment cast and could benefit from the extra AC that MV provides.
HTH,
Gilwen