Throwing on horse?

[Villain]

I was talking to my friends about my lvl 33 horse thrower that i did quite a while ago. And i told them my build which did not include HA points because i thought a horse thrower did not recquire it? They said it does? could someone confirm ? If it does and i went lvl 33 without i will laugh so hard

[Zlisch_The_Butcher]

HA gives you more accuracy while moving and (I'm fairly sure) buffs damage on horseback as well, throwing is the one wpf form not penalized by having HA (HX and HA lose 10 wpf for each HA point they have), it's not necessary, it's nice to have though.