It would be cool if there was a formula that displayed "points".
A blend of kills (cuz finishing people off is important), damage done, all of this then modified by the quality of the people you are attacking (accounting for their level, gear value, and current points score). Also take into account dehorsing people, and the quality of rider who was dehorsed.
This kind of point scoring would take into account a lot more factors than raw kills or even damage, and balance scores out so that people who go after top players and succeed (at least at damageing them) are being rewarded better points than peasant hunters.