Right now we have overall ranking, player vs player, but if it would be possible maybe adding separate class rankings would be good idea ?
cav vs cav, inf vs inf, archers vs archers
when one player kills other, game checks if both of them were mounted, if so it consider it a cav duel.
if both players had equiped bows its archery/ranged duel
if both were dismounted and and equiped with melee weapon its inf duel