So this is my first build and I hope u guys like it. I have been playing LoL for a while now and I started to play Ashe a lot. She is a great carry with some annoying CC's, if you play against her :) I always build her to do huge damage fast, so I will show u how I usually build her. I will update this build further on! And I'm sorry if I misspelled any words! Enjoy

Pros
-Good CC's - Slow and stun with
-Good harasser - With and
-Good farmer - Use
-Good in all lanes
-Good Carry
-High damage mid and late game
-Can detect hidden enemies with
-Extra gold from passive

Cons
-Squishy
-Often targeted first in fights
-Your ulti is a skill shot, so you may miss your arrow = sad face
-Sometimes you will run out of mana fast

Greater Mark of DesolationGreater Mark of Desolation x9
Greater Glyph of Furor x9
Greater Seal of Furor x9
Greater Quintessence of DesolationGreater Quintessence of Desolation x3
A lot of armor penetration and increased critical damage is all I have. Together with and it's awesome! Some of you maybe want to have some mana-runes, but you get some regeneration via Perseverence.

This is my usual build order, but of course you should always read the game and build after that.
Doran's Blade gives you a little extra damage, lifesteal and and health, so you don't really need any healing pots. Berserker's Greaves gives you movement speed and and and 25% increased attack speed.
After this i start to build attack damage with Infinity Edge , this item is so useful to get as fast as possible because you will hit very hard and get increased critical chance.
After this you want to make your damage more effective by ignoring some armor and Last Whisper makes your whish come true + some more attack damage.
Phantom Dancer will increase your attack speed, movement speed, and critical strike.
And finally The Bloodthirster to give you pretty good lifestealing and attack damage.
You also get bonus lifesteal and attack damage when you get kills.
If the game is not over after this, sell your Doran's Blade and buy something more useful. The choice is yours! In this build I buy a second Phantom Dancer to make me even more faster. But another good choice could be a or

In my opinion you should level up your to top level and after that level up your . Of course you should almost always level up your ulti when it's possible, beacasue you will win so many fights with it. If your enemies hides a lot then hawkshot is good to have to reveal them. But level Hawkshot as you please. Sometimes it's good to level that skill for extra money..

As u can see I set my masteries to focus on damage. Offensive Mastery will help you with your farming a bit, but you can choose to spend those 2 points on something else if you feel like it, but this is how i build. The other things I spend points on is obvious to make your damage as high as possible. And little extra protection and health/mana regeneration.

Ashe is a really good farmer. The first skill u should choose is [icon=Volley size=40} to dagame multiple minions with one shot. As you get stronger you will kill many minions with one shot of Volley. And as you get faster you will kill minions fast only by auto attack them. I usually have the most minion kills which is good beacuse you need the gold early game.

Usually when playing Ashe, you have to take mid lane if there isn't any other ranged guy in your team. And you should not have any problem with mid lane as Ashe. If you not get mid lane you end up in top or bot lane with a buddy.
What you should think of in this situation is that you should harass the other team with your Volley and your Frost Shot. Try to to hold the other teams heroes back so they do not get any minion kills or xp. Good communication with your teammate is very important, and will lead your team to victory. Your Hawkshot comes in handy when you want to scout the map a bit, revealing the map for a short period. Very useful if you want to scout Dragon or Baron fast.
Ashe's ulti Enchanted Crystal Arrow is very useful to initiate a fight, especially in a team fight beacuse even more will die. This is important beacause when you play with your team you should know that if there isn't any support in your team, you will often be the first target. So if you start the team fight with your ulti, it is less likely u will die.
As you level up you will become stronger and late game you will have to carry the team to victory.
So if you use this build together with your good abilities, then you can kill anyone. For example: Using your Frost Shot will slow your enemy down, making them unable to run away from you. So if you want, you can auto-attack them to death.

Heal and Ignite is my standard spells. In this build you have Heal instead of early healing pots and late game u can safe some life. Ignite is always good if you can't make that last hit. Then you can make your opponent burn to death instead.
I have understand that some peaople thinks Ashe often gets low on mana, I've never had problem with that, but if you do Clarity can be a good option.

I can also see and as useful, but I almost never use those spells

Don't pick Clairvoyance beacuse you have