I'm now convinced it doesn't drop. I know it's just bad RNG...but really, the only sin stuff that drops is all dps stuff...even when I'm the only inquisitor in group. Getting old.
I've run a total of 36 (55) HMs on my Guardian Tank without a single drop for my spec or class. I've tried running it with other Guardians, but only healer items dropped. If I remember correctly, the drop system sucked much less pre-2.0 than it does now. Whatever BioWare did, they need to undo.