Hot tip for the runic dungeons. Build a wall in front of the key hole's section, then break 1 block and use the key through your wall. You can then fight off the mob's through the 1 block hole. 2 very basic spells from AM2 help a lot here. Projectile Light can lower spawn rates in the room and Projectile Dig can break mob spawners and both can be fired from behind the safety of your wall. I found runic dungeons to be pretty easy with this setup.