Let me start of by saying I am a terrible speller. This is my first build. I have been looking around at everyone elses builds for ashe, most of which work great, and I think this is the best build for ashe. You need to have some skill with Ashe because she is very squishy in this build. Stick with your team and always be aware of MIA's you'll be ganked alot. And never be greedy!

I'm really sorry that this is such a ****py build I will work on it later this week.

PROS

Strong crowd control
Great in team fights
Great 1v1 and 1v2
Farmer
Can hold lanes very well
Crush turrents
Insanely fun

CONS

Squishy
Slow
Cooldowns are high early game
If stomped early game your done

Mark of desolation: This gives your auto attacks great power and this is nessicary because Ashe is a great auto attacker.
Seal of Strength: This is really only viable if it tire 3. Until that point I recommend Seal of Vitility. Seal of Strength greatly improves your attack damage making you attacks crush the enemy from begining to end.
Glyph of Fortitude: This is handly early game if you dont want to use this I reccommend either the Glyph of Might or Glyph of Furor.

The masteries are very self explainatory. Offense for damage utility for mana regen and xp.

My items were picked to make you a hybrid of AD and AS your volley will do great damage because of this.

Start off with Doran's Blade to allow you to lane longer because of it life steal and it gives you extra damage for you auto attacks and volley. Try to stay in lane until you have around 2200 gold then return and buy your first BF sword and boots. If you have to return before then buy another Doran's Blade. Then the next time you return buy you Infinity Edge and boots or just your boots.

Last Whisper, Banshee's Veil, and Bloodrazor and all optional items. If they have a tanky dps or a high armor tank like Rammus get last wisper. If they are alot of mages get Bloodrazor. If you are being targeted get Banshee's Veil
Remember you need some since of what your doing with Ashe to use these items correctly.

In the beging of the game it is important that you harrass with your volley. If you keep making them fall back out of the xp you will soon out level them.

Durning a team fight it is important that you talk to your team and pick one person to get first. This is the person you will use your ult on. When everyone is grouped together you can destroy them with your Volley. When they try to run Volley them and use your frost shot. They cannot escape! Make sure you check the baron every now and then.

I use Clarity because early game your mana is very low and you run out quickly. In order to stay in your lane longer you will need this. Flash is handy once you get your ult. My favorite thing to do is hide in the bushes until they are infront of you then ult them and flash behind them. It's almost a garanted kill everytime.

This build is unstoppable if you know what you are doing. Flash behind them and stun them as much as you can. If you want a good Ashe on your team and I feel like playing invite me my name is Unsactioned.