DPS : (Damage per second)
peel : (Help, defending, protecting)
position : (Staying at a certain location)
freeze : (Its what the name is, just pausing/slowing/freezing something >.>)
First off what I want to say is Ashe is currently low in her state at the moment because she has lower dps than other carries
IN LANE
But then again it's not the ADC at fault but with support that changes everything in lane.
For example,
+ 
VS 
+ (If you're playing a normal blind pick)
This match up is on Graves's favor because of the amount of dps he does
(You get the point)
Alright, enough examples
For your questions
-
"How do you build her?"
-
Since she doesn't have much DPS and she's basically like a utility champion,
you're forced to build her DPS from pure scratch in lane.
>> 
>> 
FIRST (The active is super good with her passive)
>> 
>> SECOND
>> 
>> 
>> 
THIRD
>> 
>> 
FOURTH
>> 
>> 
FIFTH
But there's other situations that make the build change like.
first
second
third
fourth
fifth
sixth
- (Against
)
etc.
The defensive item is very important if you don't get enough peel.
(Is a good item overall because of the passive spell shield against people like)
who can single you out in one spell basically.
(Also a good counter to 
)
(lol, just don't)
There are many defensive items that can replace Randuin's Omen
and are very more effective than this.
and also you're Ashe, no one can really get close to you since your kit is all slows and stuns..
If it gets to the point that you lose duels 1v1 against that one Marksman even if you're full 6 items.
It's time to get weird.
The magic damage and armor Thornmail provides is surely a guarantee win on your side.
(and maybe a summoner spell would help too 
) Kappa
The
"WE NEED THE ADC ALIVE TO WIN"
Starter Pack
With one of these, you might need to position yourself a little more careful since you practically have a second life if you get singled out.
Second life, what more can you need?
lol
(It's damage AND cleanse... use wisely!)
- "Do I poke a lot in laning phase or play safe and farm?"
(Ima just copy/paste what I just said on a previous botlane help thread)
There are 4 stages during the lane phase,
The first stage is the early level 2 rush, which determines who gets the easy snowball route.
You're guaranteed to get some summoner spells out of them or first blood.
The second stage is the "I MIGHT GET GANKED" phase.
So you gotta really be careful on how you treat the lane minions,
There's a certain way you need to keep them so that it doesn't shove to their side or shove too fast to your side.
and at the same time you need to harass the enemy support/adc whenever they get near your attack range.
and then you have to manually coordinate your left hand to a certain degree of which needs to be divided by Pi
jk
There's certain times when you don't poke, and that's when 
's Q is on the enemy adc,
or 
E
or, 
E
OR, 
PASSIVE IS ON YOU. . .
but yeah.
(You'll get used to it, easier done than said)
The THIRD stage of the lane phase is when one side has the advantage of the other,
(This is when it all comes down to bullying off both the enemy ADC and Support to back)
THIS IS WHEN YOU DRAGON WITH YOUR TEAM
The FOURTH stage is when it all comes down to take the enemies turret and group fast to push down either mid or some other lane to the point when its a one sided win.
le fin
- "After taking down a tower and dragon, what should I do?"
("The FOURTH stage is when it all comes down to take the enemies turret and group fast to push down either mid or some other lane to the point when its a one sided win.")
- What should I do if I'm behind and my tower was already taken?
Well, that's when you usually just freeze the lane at your 2nd tier tower.
yeah, i'm not gonna explain on how to Freeze a lane in text so here's a video of it.
https://www.youtube.com/watch?v=uthpZ_R_6_g
- "How do I position myself in fights, especially in the jungle?"
Excuse me, the jungle?
what
First off you don't have a team fight in the jungle since it's too clumped and very little space so you get cced/focused on the fastest since you're isolated in a very tight space.
So try and do avoid fighting in the jungle as Ashe.
You position yourself away from their gap closers, attack the nearest thing on sight, (without getting cc chained of course) your ultimate is the key to your victory. ETC
- "How much CS should I have at x minutes?"
You know, there's times when you miss creeps, but for a legit reason.
So try and not miss any creeps during lane phase, it's very crucial since you need the gold for your items.
but do not put all your time and energy into getting 100 cs at 10 minutes. . .
because that's very unlikely and will probably get you killed in lane phase since you have no items other than a 
.
- "How and when should I use my ult?"
You need to examine the situation and determine likely moves of your opponents. Where are the minions they want to get last hits on? Are they engaged with your allies? Does it look like they're about to run away because their lane is pushed into your tower and they're scared of a gank? Knowing the behavioral patterns of the player as he moves the champion (gained from observation) helps, as well as how much he can or cannot maneuver around.
Also, your friends in the lane can help ensure the arrow hits by you pinging exactly where the arrow is going. Or if you ping the enemy champ you just shot the arrow at while the champ is still standing there, your allies can position themselves to encourage that champ to stay there (whether that be by moving back so as not to scare the enemy away or moving forward and 'baiting' that champ into a fight).
If the lane is evenly matched or your allies are behind, many enemy champs will just stand in place and fight with one of your allies if your ally is in their attack range. Most enemy champs that are engaged in an even exchange fight with one of your allies in that lane won't even notice the arrow coming. Additionally, if the target is about to move away from where you pinged, an ally can use a stun or snare to get the enemy champ to not move (although this usually encourages an enemy to move as soon as the enemy is able to do so, so it has to be used well).
It also helps to fire arrows into duo lanes. Duo lanes often mean that you can fire an arrow in a way that will ensure at last one champ gets hit.
Another option is to shoot the thing from closer up. You don't need to spam your ult arrow from fountain for a hail mary chance to hit just because it's free, and you don't always need to fire an arrow into a lane you're not in.
Hope this helped in some way~~
Source : I main the ADC role and I'm currently Diamond IV in Solo Q
if you have any more questions ask me in game
ign: detroitsHERO
P.S : Don't forget to always buy a 
when you're full items!
and you get an ice crown for the rest of the game)