I have killed guards Kithon, Kevin, Stacey, Evercold, Captain Dustan Coldheart, Soren something or rather, and a few others. . . they drop up to 6pp, and cheap gems sometimes. . . best thing I have looted off these guys yet is a Black Pearl and a Peridot. . . that breast plate story is TOTAL BS.
Skildoroth Painbringer
Iksar Necromancer
45th Season, Saryrn
Don't know about Guards farther in though. . . I only kill the guards near the exit, lol. . .