Video is Self Explanatory.
Not guaranteed to be fast, but definately guaranteed to be easy. (They respawn almost instantly, with no chance of you missing.)
That is, if you're not under constant attack.
[ame="http://www.youtube.com/watch?v=2Apkt-j7mEs"]YouTube - Farm. AB. All by myself.[/ame]
PS: I don't think instantly respawning critters, which give weapon skill, is supposed to be in the game program. Damn you judgemental people.