Cancer Ashe (ARAM build/gameplay)
RUNES: http://i.imgur.com/VKIhPWy.png MASTERIES: http://i.imgur.com/CP4sLqY.png
The goal of this build is not to deal massive amounts of damage instantly, but rather annoy the shit out of everyone on the enemy team with max CDR and W damage. Since you have so much range with W, and you don't end up auto attacking all that much, you can dish out substantial damage from relative safety. This is not as good as one of the amazing ARAM champs like Lux, Varus, or Soraka, but this comes pretty damn close.
MAX: W at all costs, no exceptions. You do not autoattack unless you can 100% safely do so. The goal is not to die very often so you can get as many Ws off on the enemy team. Your other abilities are mostly useless, although you should still probably max Q second.
Start: 
x5
Core: 
(order: tear directly into BC, cooldown boots, muramana, then liandrys)
Also build: 
then 
The damage output this build offers is obscene, but you need to stay far in the back to get it all out. And with max CDR, do not be afraid to use your Ult as an execute/poke/disengage. This ashe playstyle is nearly untouchable by opponents, except those with hard engages or the means to avoid your damage completely (fizz is a major offender)
Known issues: Damage output is low-mediocre until you hit level 9 Complete lack of burst If your team completely loses before you hit level 9 with items then there is nothing that can be done about it
