This Sivir build must be tried before you downvote it. I know you are an experienced player, i know the standard Sivir build and i played it for a long time. Yes, it downs towers, it kills 30 minions in 5 sec, but every time you get jumped, you are an instant kill.

This build gives you survivability, a lot of damage (about 300 ad) and, most important, the best taunt in League of Legends, just for being Sivir. (OMG, Sivir alone in lane, i go gank him! - NOT!!!). There's a catch. If you don't focus Sivir and try to ignore him as you do with Mundo, you will probably lose the whole team, since he does a lot of damage.

Just try it once, you will love it. Sivir with 5-6k hp and 300 ad will be so much fun.

For runes i use all Attack speed runes since runes and boots will be the only attack speed you will get. You dont need mana, hp, ad, crit. All you need is attack speed.

- 9x
- 9x
- 9x
- x3

I start with Meki Pendant and 2x Health Potion .

Go back and buy Tear of the Goddess and maybe Boots .
Finish your Manamune and your Berserker's Greaves .
Get one Warmog's Armor , then an Atma's Impaler .
Last two items complete your damage+survivability build with another Warmog's Armor and finally Banshee's Veil .

Now let's see why i think this build is much more effective then the normal build:

We got 2 very important items: Atma's Impaler and Manamune .

In combination with 2x Warmog's Armor and the Banshee's Veil, these 2 items give you increased attack damage. The longer the game lasts, u become more and more powerful.

You will get about 3k mana late game - this means a raw 60 ad (+20 from manamune), a total of 80 ad just from this.
You will have about 6k hp. Using atma's, it will boost your ad for 120 ad raw.

Added to your attack damage, you will have about 300 ad. That's a lot for a .

The cool thing is Sivir can fill up those warmogs really fast and your attack damage and hp will go up really quick.

For skill sequence, i max for farming and harassing.
Get one point in at lvl 2, then max out and .

For this build i use:
TeleportGhost

Teleport is great for Sivir, you can bring down a tower in no time, so if you see your minions on an enemy tower, go teleport and bring it down.

Ghost is for escaping ganks. Banshee's Veil + Spell shield + Ult + Ghost makes it almost impossible for enemy team to gank you.

I can't think of a better summoner spell for Sivir.

For early game you should harass with and get your mana up with .
Every time you meet a Caitlyn and she puts her trap down, cast Spell Shield and run over it. (works on her ult too)
Every time a Brand casts his pillar, cast Spell Shield and don't move a muscle.
Every time a Karthus puts his dot on you, cast Spell Shield and accept the free mana. (works on his ult too)

You get the ideea. Harass with Boomerang Blade and get mana with Spell Shield. Ricochet is always on for pushing.

People tend to gank Sivir if mid, so buy 2 sight ward wards and place them in the bush every time you get back home.

Focus on backdoor towers and farming minions for your Warmog's Armor .
You usually have 200 minion kills at lvl 14, so you will have a great advantage in gold.
Don't try to get kills, you don't need them. If you die, you lose much more gold. In 1 min of farming, Sivir gets more then 300 gold (15 minion kills), so don't overextend in enemy jungle for a stupid kill on a Shaco with 10% hp (who could just as well be a clone).

The main thing is NOT TO DIE.

By the time you hit lvl 18, you will surely have your 1st Warmog's Armor, Manamune, Atma's Impaler and maybe a Giant's Belt .

Now you can kill, so if someone comes to gank you alone, don't run. Just back off a little and see if anyone else is coming. If not, engage and get the kill, then continue your quest (towers and minions).

Sivir usually plays the whole game solo. When there's a team fight on bot lane, Sivir is on top lane downing 2 towers.

When your full build is ready, your team will probably have 3-4 items ready. You are now tank, fighter, carry.

Note: remember to turn off your Ricochet when attacking an enemy tower with enemy champions around it. It will bounce into that enemy champion and you will get tower aggro (and that's bad).

Pros:
Great Farmer
Great Survivability
Great Escaping Tools
Nice Damage
Can bring down a tower in 10 sec

Cons
Won't score a penta kill
Never Legendary
People tend to troll about your build

As a conclusion, all i can say is that Sivir is a really fun champion to play, you will never get bored of her.

I'm not saying this is the best build for Sivir, it probably isn't, but this is the build that suits me the most and this is the most fun build i tried on her.

People will troll about your build, but hey... people troll about Sivir picks in general, so it doesn't matter anyway since you already looked for a Sivir guide.

Don't listen to them, Sivir doesn't suck, Sivir is not squishie, Sivir is not useless.

Sivir is just annoying.