i tried horsexbow last gen it was annoying both for me and others:P
Is it viable if you don't put any points in Horse archery. Can you be decent 1Hcav and HC at the same time? I still wonder how did Elmer manage to be HA and 1H cav at the same time. He needs a lot of skill points for that.
If I could respec (without loosing half of my XP) I would probably make hybrid like Elmer has but with 4 HA, lancer like Kerrigan (without shield) or 1H cav like masasa (8 PS, 6 riding). Sadly, this game becomes too serious when you get on higher levels and stop retiring...