A Knight of Light, from a map found online... Usually (if, say, there are 4 players), one plays as Rampart (with Jellu), another as Tower (with Dragon), another as Inferno (with Xeron), and someone else as Stronghold (with Kilgore). In the standard scenarios (which are originally on the game disc), they are, of course, disabled.
I don't see anything unfair about the hero Xeron (specializing in demons) - the bonus from his specialty is negligible, unlike Kilgore. So, such maps definitely don't have a good balance. If you're going to play with people, it should be under equal conditions. I've downloaded many maps, but I delete those kinds of maps immediately.