That was the type of build I played from August until December, a 1h/shield HA light cavalry. I think it had no athletics, 3 shield, 21 or 24 agility and about 130 1h and 170 bow. For gear I used a regular cavalry shield, battle axe, khergit bow/arrows and a sarranid horse. It was nice having flexibility at that time but like you predict now, kinda mediocre in the power department compared to more dedicated builds.