One thing though, I don't allow characters to purchase both Combat Luck and Armor Mastery. They can have one or the other, not both.
Yes, Impenetrable is not part of it as Penetrating damage is not stopped.
And you are right I did forget Restrainable changing it to the following:
Armor Mastery I
Armor (4 PD/4 ED) (12 Active Points); Only Half as Much as Worn Armor (-½), OIF (-½), Must be Aware of Attack (-½), Restrainable (-½), Not verse Critical Hit (-¼), Not verse AE (-¼)
3 Points
Armor Mastery II
Armor Mastery II: Hardened (+¼) for up to 36 Active Points of Worn Armor (9 Active Points); OIF (-½), Must be Aware of Attack (-½), Restrainable (-½), Not verse Critical Hit (-¼), Not verse AE (-¼)
3 Points