21/15 (lvl 30)
5 if
7 ps
3 wm
4 shield
5 ath
5 ride
Served me very well. Ton of one-hits, can take a punch and decent on ground. Go for unaware people (preferably ranged) as much as you can. When you deal with aware infantry, outreach the ones you think will try and attack you (change speed on your horse, move to the side, hit at full reach in the head) and bumpslash the ones you believe will try to block. You can tell a lot about what a guy wants to do by his movement and/or if he puts up block or attack. Stay away from the best players if they're aware, you're at a disadvantage on top of your horse.
For lancers, do like Huseby told. Use your shield to guard for his lance (look down to protect your horse) and circle and slash until his horse is dead. When he's on the ground, circle to his back and wait till he's far enough up to be hit in the head, but not far enough to turn around and block your attack (preferably be moving still for extra speed bonus).