As someone who plans on having a main rogue, I've appreciated reading through the responses in this thread. I was wondering about something similar, though a different way to ask the question: is it viable to 4-man dungeons, and if you were going into dungeons planning on only using 4 characters, which would you use?

Part of me is tempted to just treat my rogue like dead weight and have him maybe sap and do little/nothing else. Is that viable?