Honestly I think everything is pretty balanced, except xbow they can all burn away, it's just that people don't work together. two handers charge first trying to get their kills, archers fire and whatever target they can rarely helping a duel because if they hit an ally they often immediately get m'ed, and horses run around trying to hit people from behind. (except Xeen during his horse phase when he just put his shield up and charge into groups with the plated charger)
The cure is teamwork and if you want even a remote amount of teamwork play siege. Less horses and people actually fight harder to win rather then get the top score and say everyone else sucks, though you can't escape that kind of attitude where you go.
If you want the best balance, with less horses, no archers, and even teams? Play chess.