It is very frustrating when that happens, just do what Teeth or Gurni said, those are your biggest chances of killing the horse, or you just gotta hope the horse has low health
You ride an armored pony now, can you tell me how much does it take for a bamboo or any other spear for that matter to take you down when stopped from front. I guess while ridind with the speed bonus you take quite allot of damage but how much damage do you take standing still while people pike the horse.
Also yes i tried Gurnis and Teeths suggestions and must say hitting the head works but the legs work better. also the ass
As for equipement suggestiosn I really don't mind using Ashwood, it's a great weapon just maybe a but too short. I am love playing with Bamboo and don't intend to stop using it anytime soon.