I know DKs are not good, but some people like me farm them. I am currently working on 1337 DKs. Its gunna be leet.
As horde, travel to the deeprun tram. On either side SW or IR, there is a civilian that respawns instantly after it is killed. Killing this for 1 minute will get you about 30 DKs. You can also DK farm this dude using a very simple bot that right clicks for you once every second.
Clicking "Bot" provided by cmill72
http://www.geocities.com/mangokun/au...useclicker.htm
-set the click location anywhere towards the middle of the screen
-change it to right click instead of left click
-set the interval between clicks to 1000 (1 click every second)
zoom all the way in and make sure you can only see the gnome on your screen. You can walk away and come back in an hour, and have a ****load of DKs. Happy farming, even though there is not much point to it >.<