I agree with Oberyn on weapons. The extra 10 wpf in pole doesnt do much (at least didnt back when I used lance) and a 100 wpf shield + sword combo is quite decent in a wide range of melee circumstances, and most certainly better then either of those poelarms when outnumberd (and you are often outnumbered after being dehorsed)
To also be constructive, my build for 1H Cav/inf hybrid, pretty similar to Oberyns
(lvl30)
15 STR
21 AGI
5 PS
5 Shield
7 Athl
7 Riding
5 WM
~145 wpf in 1h
- as i only use 1 weapon type, got +1 to shield skill and +1 to athletics for better footwork (mainly for strategus and being dismounted)
- used arab horse before, now enjoying destrier. Arab is more powerfull, Destrier is more defensive (survives longer), pick what suits you
- arab cav sword for max cav power, nordic champ for balanced, anything works though (main stats: range, cut dmg)