It doesn't seem to drop any more or less than that.
You can expect the armor piece on about 1 out of every 10-15 kills. People will come and go as they complete the quest, just keep it on auto-join and the group will go on forever.
Then, just go around and kill what you can, or just get loot from bodies. Create/join a group using the group finder. If you are a low level, wait for a world quest to be up. Just make sure you don't kill Lady Ssathara! That will end the quest and you'll phase into the real world, where these things don't respawn. You can sit in one spot and fight them all. The VERY BESTEST place to farm during the world quest The Cost of Power is at 72.0, 25.6 because they almost instantly respawn. The BESTEST place to farm in that area is during a world quest. Comment by jediwumpAfter farming these every week on three different characters, I can safely say that the best place to farm is on the shore near the words 'TOMB OF SARGARAS' on the map.
