Knight Otu said:
An amulet of natural armor does stack* with existing natural armor.

I've got no real input at this time, but since I'm not subscribed to this thread, I'll poke my head in from time to time.
*Technically, it increases the bonus. It grants an enhancement bonus to the natural armor bonus.
Well I'll be...you learn something new every day.
BOZ said:
either that, or an insight bonus equal to Wis mod (kind of like they have in BoVD, but not exactly). i'll be fine with either.
I'm fine with the insight bonus, since the Demonomicon versions of the archfiends retain it.
BOZ said:
that, and we need a mechanic to determine what the natural armor should be (again, to make it easier on us later). 1/2 HD might be a good number, for example. maybe that plus Con mod?
I'm not sure if a formula was used for any of the others, so I'm not convinced we need to get locked into one here. It might be best just to "eyeball" it on an individual basis.
For ability score arrays, here's how the others look, by CR:
CR 19
Fierna: Str 27, Dex 23, Con 25, Int 26, Wis 26, Cha 37
CR 20
Pit Fiend: Str 37, Dex 27, Con 27, Int 26, Wis 26, Cha 26
Aspect of Bel: Str 38, Dex 15, Con 30, Int 27, Wis 27, Cha 25
Bel: Str 40, Dex 16, Con 32, Int 27, Wis 27, Cha 25
CR 21
Belial: Str 27, Dex 23, Con 25, Int 26, Wis 26, Cha 37
Aspect of Dispater: Str 37, Dex 14, Con 35, Int 29, Wis 22, Cha 29
Aspect of Levistus: Str 24, Dex 24, Con 29, Int 25, Wis 32, Cha 27
Aspect of Mammon: Str 34, Dex 15, Con 33, Int 28, Wis 29, Cha 25
CR 22
Aspect of Glasya: Str 27, Dex 34, Con 27, Int 27, Wis 28, Cha 36
Geryon: Str 36, Dex 19, Con 35, Int 26, Wis 24, Cha 23
Hag Countess: Str 31, Dex 26, Con 24, Int 28, Wis 31, Cha 28
CR 23
Aspect of Baalzebul: Str 39, Dex 13, Con 34, Int 28, Wis 27, Cha 25
CR 24
Aspect of Mephistopheles: Str 25, Dex 27, Con 26, Int 27, Wis 31, Cha 28
Belial: Str 29, Dex 25, Con 27, Int 28, Wis 28, Cha 39
Fierna: Str 29, Dex 25, Con 27, Int 28, Wis 28, Cha 39
CR 25
Mammon: Str 36, Dex 17, Con 35, Int 30, Wis 31, Cha 27
Levistus: Str 26, Dex 26, Con 31, Int 27, Wis 34, Cha 29
CR 26
Dispater: Str 39, Dex 16, Con 37, Int 31, Wis 24, Cha 31