This is a very quick guide to "Azwraith, The Phantom Lancer". This is not very detailed but just gives you an idea of how to play this hero. Some would suggest otherwise but this build is tested by me personally on different situations and i would just like to share it with you.

Team Role:
Early Game Role: Carry Farmer
Mid Game Role : Carry Farmer
End Game Role : Pure-carry

Carry Farmer:
This hero is one of the strongest late-game with the proper items. Early-game he is paper though. You are the pure carry of your team and if you have decent teammates they would know that you need items to be of much use mid-game and end-game. And needs to farm for more gold to increase his dps potential. Try aiming for an early Vanguard to ensure having less deaths unless your teammates got your back and told you to go straight for a Radiance.

Carry Farmer:
After obtaining Vanguard you are now capable of assisting teammates during clashes but still I suggest you focus more on farming. I suggest you go farm for Radiance during this stage of the game. It would help you get your next items and gives you the presence your team needs during big clashes.

Pure-carry
During end-game this hero is one of the most feared. With Radiance and Mana Burn, this hero would be hard to ignore. Do not over rely on your doppelwalk for your survival. If you don't have at least a Vanguard you are easily f***ed by gem. If your enemy has gem don't escape via invisibility, rather, run with all your illusions at the same time and try to mislead them to following an illusion and you going the other way.

Item build:
1

Justifications:

You need to attack fast and the +8 agi and attackspeed from treads adds to your farming ability especially against neutral camps and increases your spirit lance damage thru illusion attacks. You need to attack fast to be able to quickly generate illusions around him. This is a no brainer, I shouldn't have elaborated on this.

Ring of Basilius gives you decent regeneration and armor. One of the best early game items.

What's the use of having great dps if you're gonna die in 3 seconds just from chaos damage. Vanguard is a decent solution for that. Allows you to stay longer through skirmishes and clashes to be able to produce more and more illusions and to be able to deal more damage. Sell PMS when buying this.

Radiance is the ultimate item for this hero. Some would even rush it early just to be able to improve his killing and farming. Some can, some can't. If you try go for it early and get ganked a few times early with just the use of the cheap DoA, then you are f***ed. If you can, then, by all means, go for it. If not, go for my safer build route.

Extension builds are up to you. That's where your creativity and good assessment of the situation should come into place.

Honorable Mention:
1.

It gives PL what he needs: extra mana for casting spells, high agility for you and your illusions, and the purge ability. The mana burn especially from the illusion spawned from casting spirit lance would be a great nuisance for your opposing enemies.

2.

If your illusions easily go down from opponents AoE skills, then, this item can get you back on track real nicely. Lost your illusions? Click and "Walah!" instant pair of illusions. The Yasha component is also nice.

3.

The best agi item to improve you and your illusions. This used to be the best end-game agi item on DOTA. Guess what? It still very much is. 30% Evasion is huge, plus you get high armor and great damage and, have i mentioned the Evasion?

Skill build:

Lvl 1 Spirit Lance
Lvl 2 Doppelwalk
Lvl 3 Spirit Lance
Lvl 4 Juxtapose
Lvl 5 Spirit Lance
Lvl 6 Phantom Edge
Lvl 7 Spirit Lance
Lvl 8 Juxtapose
Lvl 9 Juxtapose
Lvl 10 Doppelwalk
Lvl 11 Phantom Edge
Lvl 12 Juxtapose
Lvl 13 Doppelwalk
Lvl 14 Doppelwalk
Lvl 15 Stats
Lvl 16 Phantom Edge
Lvl 17 - 25 Stats

Justifications:

This build maximizes PL's farming ability. Of course, you max Spirit Lance first. That's your main nuke and chasing skill. I get just one level of Doppelwalk just to have an escape mechanism in case things go wrong. I try to give balance to Juxtapose and Doppelwalk leveling depending on the situation. If your opponents are not ganking you often then this build is all good. I need juxtapose illusions for farming neutral camps. It increases my damage output and allows me to quickly clear neutral camps. It helps in farming the lanes too. Phantom Edge whenever able. Remember: Illusions are your strength. Buff them with agi items, mana burn and radiance aura. Meanwhile, you yourself should have some sort of survivability. Do not rely too much on invisibility, it is easily countered. By the time your opponents go for a gem you should be able to fight toe-to-toe against them or you'll get raped hard. It's hard to go "Rampage" when you're already dead. Vanguard works fine for me.

Good Allies

Anybody with a decent disable is a good ally to every hero so I would mention only a few with great synergies with him.

Heroes that can spam their skills to defend towers (turtlers) can hold the defensive line most of the time while you are focusing on farming. You are one of the strongest late-game heroes. These heroes help make sure the game wouldn't end before the 40 min mark. Their AoE skills also add to the chaos during teamfights making guessing the real PL from the illusions a much more confusing task.

Weaknesses

Even though they are great allies, they also are fearsome foes. AoE skills and cleave can make your illusions disappear in no time, leaving only the real PL.

An early gem, dust or sentry wards can really ruin what you thought would be a Godlike kind of game with PL. With that said, you have to remember this: "Do not rely on invisibility throughout the game."

Azwraith at the Competitive Scene
Not a very usual pick but still viable. His potential is huge. The only setback with this hero is that he has to farm for most of the game. Since he is melee, he usually farms much faster only after the laning phase. They rush Radiance on him as his first item. He relies on his teammates to gank and defend for him during the early stages of the game. An early Radiance on him still doesn't guarantee a win making choosing him as a carry a big gamble.

Where can I find replays?

I suggest you go to Dota Commentaries.com as they don't just give you replays, they also give some analysis of the item builds, warding and team play. Not to mention, they are commentating competitive games and not your ordinary pub games where any build would work.

If this guide has helped you in some way, please feel free to comment and/or rate my mini-guides. Thanks a lot!

Good luck! And remember, reading guides gives you ideas, but, only thru constant practice does one achieve greatness.