Well, with both Devimon and Daemon being evil masterminds I would say Daemon, as it's more of an evolution. Basically, he's an upgrade of Devimon. DoneDevimon, however, if literally of the Devimon species, but is almost a mindless force of destruction. So it depends what you're looking for in an evolution. Personally though, I would say Daemon. But then again, more than one Digivolution line can lead to Daemon, so the Devimon line isn't the only option, but DoneDevimon is a direct line from the Devimon stage.