Cav one: Heavy Lance, Shashka, Knightly Kite Shield.
Cav Two: Heavy Lance, Polearm backup.
My first one has survivability, the second one that works even better has less survivability (and the 4 shield skill now looks kinda stupid with the new patch), , but honestly has the tradeoff of a very nice melee capability.
I am ok with this. Cavalry does not need more slots, just choose your role.