the_fake_tetsuo
Veteran
I might be extremely late to the party, so apologies if this is old news, but I came across an uncommon stat on armor with niche sources. Any type of armor from timeless isle armor tokens for tanks (only tested with plate) have a chance of gaining bonus armor as a white stat because* of specific affixes, and WoD gear can have one of their secondaries replaced with bonus armor, but I'm assuming only on necklaces, rings and such. As far as WoD goes, I think it's a safe bet that bonus armor as a green stat follows all the rules it did when it was live. MoP bonus armor seems to work differently altogether.