Hitting someone with a lance requires a normal fightin’: lance roll. The damage is simply Strength if the wielder isn’t moving (he’s using it as a very slow (Speed 2) and ineffective club. For every 10 m.p.h. (Pace 24), the damage is 1d10 for a steel or steel-tipped lance, and 1d8 for a wooden lance. The maximum damage is 4d10/4d8. Add bonus dice for head and noggin hits as usual. This assumes a character with Strength 1d6 die type or better has a good grip on the lance and is on a fast-moving platform such as a vehicle or a horse.