I found another tar pit, but no lox nearby. It is next to a black forest, so I was able to lead a decent sized band of greydwarf there. Of course, they don't last long, so I don't know if it did anything other than provide a few seconds of entertainment. :-)

As long as you keep moving, you shouldn't have to worry to much about the tar. They also give you plenty of time to go in an melee them between shots.