Is there a guide out yet? If not what do I need to do to get the defenders?

You need to get a lot of tickets. And then go fight the cyclops, while your in the room yo burn 6 per minute i think. Once you get the bronze defender you go talk to the guy and then you can get the iron defender and so on and so forth until you have the rune defeder. And there probably is a guide out, try the search bar.