i honestly dont think its a bad build maybe boots and 3 pots to start and mix your build around but its honestly a good buil

I am ashe I must keep harassing the opponent. If he harass me, I harass him to so that's not so really a problem. Yes you will have to recall but that's why the summoner spell "teleportation" with the critical attack of ashe. That would really help you to finish him.

In the early stages of the game, what if the opponent keeps harassing you? Then you will have no sustain without a good support. You will keep having to recall or risk getting killed, losing valuable CS. You might be a few levels down from the other carry and you might lose out eventually in teamfights.

I am going to answer your question.
First, I have took some armor penetration to counter some armor build but you are right if the enemy stacks armour it would be a little bit difficult.
I prefere the begining doran's blade because you can make extra damage. You will obliged your enemy to stay unde his tower and he wouldn't be able to kill some minions and you will harass him easily. The opener boot potion is also nice for staying a lot of time on your line but you have low hp and low damage. The build doran's blade allowed you to make a lot of damage with the first critical because of the passive skill of Ashe.
You said that I would not farm ... and I would kill. But in fact I know that in mid game ashe become a deffencive AD. At that moment of the game you have to stay near your tower because of some kind of death gank. That's why I have took a bloodthirster to farm as long as possible and to be able to regen my hp when I am under a tower.

I'm sorry but even though I posted a sona troll guide, this competitive guide is not useful to me. What if the enemy stacks armour? Then ashe will be shut down hard cause your guide does not have a lot of arm pen. I have a few questions. First, why is it necessary for ashe to start with a dorans and not boots and 3 pots? she will have zero sustain if she starts with dorans, unless she gets a healing support.secondly, if she keeps getting countered by champions like vayne, I doubt that she has enough gold to get her build. and ur mentality on carry ashe is wrong. You want to go for the kill. In lane, you must farm, and take the opportunity to harass the carry, and maybe kill if the opportunity arises. But you need to farm, and your lane is a kill lane, not a farm and level lane. If you get killed 2+ times without return, then ur ashe is totally useless and will be unable to carry, provided the enemy team goofs out. Even though I'm not a level 30, I at least know that ur guide is not really a good way of carrying ashe. Sorry, downvoted.

This is not a good guide at all,it doesin't look nice either. She doesin't have damage early game which is necesary for farming and harrasing.Mana regeneration on a ad carry it's just awefull.Spells are terible,teleport,sure,it work,but ghost? Maybe flash,ignite or heal,not ghost.You've got spelling mistakes,a lot of them. Some chapters do not make sensse.I won't vote for now.