I have 391 shoulders and legs of heroic tier 12, and recently acquired the corresponding LFR versions of those pieces. I am not sure if I should keep the 391 T12 pieces or take 2set T13. (I normally play affliction mainspec and know that it is a much stronger bonus for demonology; I am also thinking especially with this I should go demo for max dps)
Any help would be much appreciated! Thanks