I have very little experience playing cav.
But I have always wondered why cav would use 2 diffrent fightingstyles. Spending wpf of both.
Is it not better to find a Polearm or 2Hand that works from horse, aswell as on foot?
Like a Hafted Blade/Glaive or Morningstar?
Sure , it might be an odd playstyle, but the upside is you only need to bring 1 weapon, and since you do not split your wpf, you will get less repaircost. 1 MW item. And you are more proficient.
Forget the shield, get some tincan armor, the horse will carry you anyway.
And the no-req 1slotcrossbow (Light crossbow or hunting)