That's how I play Ashe aswell!

item depend on many aspects, but i dont think yours is good for ashe, i think first we need bersecker greaves, and zeal. Cuz we cant ks other teamate by ashe, so supporting with ice arrow and untill ( dont try using your untill to ks our teamates ^_^ ) maybe the best choice for team work and combat. For mid game, you farm for Black clever for dealing damage. Then upgrade zeal to Phantom dancer and buy Sword of Divine ( 55% AS and our atk cant be missed ---> very important). Now we're nearly late, just need trinity Force and Infinity sword or one of them. Rune choosen is heal and ghost ( heal's good for early and combat team, ghost for running ).

no need for heal too

1 less phantom get a black cleaver and your gold bro