I was messing around with Ashe one day and found this build makes her unstoppable she put out a lot of damage

I chose these runes so u can stay in your lane for a while because with your vampire scepter to start and Mana Regen runes you only have to recall to buy things And then Armour Penetration runes as well you can own people even with high defense i also chose attack speed runes because she is a dps and she needs some attack speed

I use 21 8 1 masteries for the increased damage from offense tree defense and magic resist from defense tree and improved ghost from the utility tree magic resist

I like to start with life steal so i can stay in my lane longer then i get my beserkers greaves next i get my bloodthirster for the damage and life steal. I then move right on to another bf sword then get a phantom dancer. I then get infinity edge for the damage output after that i get a banshees veil if they have mages that are putting some damage out on you if they are mainly dps i try to get a thornmail. If they have a team that have some tanks i like to get a madreds bloodrazor to mow them down. If they dont have a tank or a tank that doesnt have much life (a defense magic resist tank) i like to get a black cleaver. After this i sell my beserkers greaves for a second phantom dancer.

I chose ghost and ignite for summoner spells ghost so i can either chase or escape and ignite for the damage and reduced healing such as if they are laning with a soraka or another support that has a heal and mow them down

I max volley first for damage next i max hawkshot because it gives u gold and build expensive