He said it had never been used in any other game as a skill, if im not mistaken. :P Either way, the fact that it is even in there means they coded it to display an error when you try to do that. So they are intentionally trying to penalize solo play? Seems like it and is one of the things I dont like about the skill. In 4 months when many people move away from this, il have to log on, ask friends to join me in raiding (il call it that), and after spending 10-20 mins because some people were "busy" or "didnt want to", il have that much less time to do it myself. I totally agree, I understand wanting group play, but if your going to offer a solo part why not make it complete.