Seriously.... If you want to farm myths I have no problem with you doing so and I do it myself but I do it in a pre-made party. Don't use Duty Finder/Roulette to do it and inconvenience the rest of the people in the group by leaving and then they have to wait for someone to fill in to finish their duty... I'm thinking maybe SE might need to make all tome rewards be given at the last boss to fix this.