I've read from different sources that General Tulius' Armor (this Wiki) and Fine Armguards (UESPWiki) are lacking specific pieces of data within the game that makes them into true Armor pieces, thus one is able to wear them and still benefit from the "Mage Armor" perk.
My questions are thus:
-What DLCs and Updates do I avoid in order to keep it this way? I know that the Unofficial patches fixes both items, but to others? (I am console now, but plan to transfer to PC play).
-How do I know tell that the Mage Armor is actually working as intended? Do I need to simply fight a Giant or something and see if I die quicker, or might it be under "Active Effects"?
-Do any other items act this way?