Ditto with my Agent. Granted, for a while I was getting around 100 DS points per diplomacy mission, obviously gathering mats for my probably evil medicine crafting.
Yuupp. Farmed DSP from Diplomacy missions, now just to get that skill to 400. I'm an Inquisitor, should max that out indeed. Spared this prisoner on Belsavis last night after he told me where to find "The Circle". My Sorc is also polite, & thankful when rewarded, usually anyway.