Rework Ashe Build, the new on-hit adc
My recommended build path
as your first core items
if they have alot of armor and there is at least one other person with ad on your team then build
before runaans
then
and
in either order.
If you didnt need the Black cleaver then finish with 
Reasoning for this build(I have used in pbe against people): runaans will fully stack your focus passive in two shots every bolt of runaans will apply both BOTRK and Black Cleaver passives When you use your q with max stacks all 5 shots proc runaans that is 3 targets who you have now dealt around 35% current health to in a single auto( armor not taken into account) and because of what you have built you have around 2.3 attack speed once your q is active that means in 1 second with your q active you will deal about 57% of their current health(ignoring armor) and that is just from the BOTRK passive, this hasn't taken into account your regular damage or any pen you have.
You don't have to like on-hit builds for an adc but you cannot deny that this build will do a lot of damage very fast.
Other benefits of BlackCleaver/Trinity: both give the rage passive which means you have increased movement speed while you also slow down your target, talk about kite.
or 