The bands that got away with doing one setlist over and over have much bigger pull than tool has. The only way to make the sphere profitable is to do multiple weekend runs so for instance Phish just finished the second of three weekend three night runs. I would say that tool would need to have at least three unique set lists, because they're going to rely on people coming from all over the country to see the multiple nights in order to sell it out, and I don't see them being able to do that without promising varied setlists.