I am no expert but I think all armors should be nerfed across the board. That would leave room for PA and make the game generally more balancable. For example, fire armor is too good against fire, but there is no room to nerf fire resist without making the armor be imbalanced. take 5 percent off everything everywhere, and then try to balance. some DR is 95 percent with AR and toughness right? I think that is impossible to balance