I am really enjoying the Killer Joe. I setup one on a small cursed earth mob farm(9x5) with a couple fans pushing the mobs toward it. Using an Etheral sword with Looting 3 has given me a ridiculous amount of mob drops. Of all the methods I have ever used for mob farms, it is my favorite so far. It is fully self contained and powered with 2 zombie generators and 2 vats. I made a small sugar farm and use the zombie flesh I get to make the nutrient stuff which powers a pulverizer for the sugar and AE2 network to store all the drops. It makes a very simple, compact, and self contained system.plus side using this method is that killer joe's count as player kills, so you should be collecting division sigils.