ADC AHRI...seems odd ?
yeah...nobody plays it... stil doesnt make it not-viable
i feel adc ahri is a pretty good concept based on her kit... a mobile,sheen procing,charming(E) markswoman ...
the utility is good against assassins,can help you with jukes and can do something to avoid getting locked up

pretty standard adc stuff...
but get some attack speed seals
flat ad quints and marks
armor glyphs

What really makes ahri adc viable
sheen--->this item is pretty important on her. rush it as quick as you can
avarice---> extra gold ...i'l take it.
statik shiv--->moves a lot,charges early... Nuf said
bork --->lifesteal,as,slows for the one skillshot you need to hit..why not?
last whisper ----> cos tanks...works well with bork too.
G.A.----> BONUS LIFE, we playing mario now :D
farsight orb ---> good on any adc(except ashe)

max ult whenever possible
next in line would be charm cos of the increase in stun duration
orb of deception for true damage or foxfire for reduced cd,you decide (i'd prefer orb)

flash and heal.
barrier is good too.

nobody in ranked plays this...but i think this has potential..a lot of potential

pros
1.mobility
2.cc
3.true damage
4.inbuilt heal

cons
1.falls off late game
2.mana problems early
3.people are gonna report you if you lose

Orb is not for harass--- remember ..use it as a ms steroid
foxfire will do peanut damage--- still an instant sheen proc

I think its viable... if you want to disagree,try it
Gl HF