Armor Mastery and Adamantine Armor

[Rocky Williams 530]

Hi. I'm sure this has been asked before, but I wasn't able to find it. Does the DR from adamantine armor stack with the 19th level Armor Mastery fighter ability?

[Grick]

Rocky Williams 530 wrote:

Does the DR from adamantine armor stack with the 19th level Armor Mastery fighter ability?

Damage Reduction: "If a creature has damage reduction from more than one source, the two forms of damage reduction do not stack. Instead, the creature gets the benefit of the best damage reduction in a given situation."

[voska66]

Only the Armor Master Fighter archetype allows the DR from the Armored Defense class feature to stack with Adamantine armor.

[blackbloodtroll]

I suggest Hellknight plate for the less armor check, armor spikes to always threaten.