Agreed, I don't think something like this would work well as part of a roulette. People just looking for their daily tomes would be upset about getting a much longer run than they expected (and, with my thoughts on rewards, possibly one that wouldn't even reward tomes). I also think it would be crucial to keep these as light party content--easier to get a four-person group together, and it fills a need for more difficult light party content that so far has been unaddressed.
