This seems to me one of those cases where reality needs to just kick the game mechanics to the curb. For one when you use a lance you Hit the target to your right (or left in the case of a left handed jouster i suppose) This means that in the case of 2 lances means one lance would have to go crosswise accross your body and the force of impact would likely kill you :)


Unless of yourse your intent is to just ram into things head long like a car and not worry about wether You or your mount can walk away from it.