Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Here's MY own ashe build.
I can't guarantee that you'll be best at your team but if you go correctly after my instructions,you should be like 14/7/18.
Skill build should be the same. First you maximize your Volley,then Frost Shot,but 1 point on Hawk Shot is VERY IMPORTANT,so you can check if the blue buff is in place,or some people try to gank you. And afterall,this gives you some extra gold,which is also very good.
You can switch one of the Summoner spells. Teleport is a must-be spell. Its part of your owning technique which you should follow. The other is either flash,exhaust,ghost or heal for survivabilty.
First get two Doran's blades in order to get some hp. Ashe is too squishy to survive early 1x1 and her cooldowns are also too long.
Later,when you have lvl 6,get boots,and do your combo,gank a lot. I'll explain combo and ganking rules later on. Sword of occult is also vital. Even if you can't stack early game,your dmg will be low,but after launching bit of ultimate arrows,you'll get stacks,from assists. Brutualizer gives you cooldowns and ArP,others are pure dmg,and some speed.
Get doran's blade and a hp potion,go mid. DO NOT USE TELEPORT SPELL [in case you get lvl 6 early enough,or you die.] Harass your opponent as much as possible but keep some mana if he tries to attack you. Try to last hit minions,and keep your opponent away.
Once you get lvl 6,even with full hp,go back,heal,buy one more dorans blade (or bersekers greaves). Then at last here comes the COMBO:
Aim mid at your opponent your ulti,launch,and teleport at the closest spot to him (minion,or turret). He'll be stunned for 3 seconds,this should be enough for you to slow him and kill. Even if he survives,he'll go b,so you should use your time,and go ganking. Ultimate has 46 sec cooldown,so you go,stun and kill some people. here goes some gold.
Depending on the situation,instead of brutualizer,you can try building Madred's Bloodrazor. But i wouldnt do that if enemy team has less than 3 tanks. So your aim is to stay behind tanks,use your ultimate as much as possible stunning,and gaining stacks from support kills.
Once you have <10 stacks,you can easily try to solo champs. Arrow-> Volley -> Hit,Hit-> Volley-> Toggle Frost Shot and this is the end.
BE AFRAID OF:
Master Yi(because he can not be slowed)
Shaco,Katarina,because they can jump and kill you.
Stunners,because they can come close enough.
After all,Ashe is too squishy to be solo late game,but she is great DPS,best mid champion(after heimer),great support,and everything you want,but not tank. !
Good luck,don't go hard on me.