Kirin, Shijin, all outside Sea Jailers, Abyssea +2 NMs in Scars/Heroes zones, all Body seal NMs in Heroes zones, AV, PW, VNMs T3 and above inside/outside Abyssea, ZNMs T3 or above, ToAU HNM, RotZ HQ HNM, KS99 HNM, all of Voidwatch, Fomor NMs in the past, in general any NM that is or was worth a crap and/or above level 95 aside from a few notable exceptions scattered here and there with extremely low attack values.
http://wiki.ffxiclopedia.org/wiki/Le...ction_and_pDIF
inb4 anecdotes about taking a bajillion less damage when stacking kaiser gear and getting instantly killed when putting on DD gear.