Before you go on and read the guide let me say a few things:

-Sivir is underpowered right now
-She is not a viable alternative to other AD carries. she is more of a support.
-Nobody really seems to know how to play her, this guide will look weird to some
-If you don't understand how and why this works, then this guide isn't for you

read the next part carefully as it's the core of the strat


How this works:

You can't be a real carry. You can't be a real support. Or a tank. So what can you be?
A split pusher.

Right from the start you want to push your lane. Turn on ricochet and autoattack (yes autoattack) all the way. Of course there will be situations where you won't be able to do this, but the point is that you absolutely want to push your lane, forget lasthits, push.

Why you'd say? because as you won't get many lasthits you will hinder the opponent's lasthitting too, forcing them under the tower (hopefully), giving you a slight level advantage, the time to buy and port back and leaving your tower untouched.
As you level up you will automatically catch up with creep kills but if you pushed enough your enemies will be lagging behind quite a lot.

What about ganks? simply put, get map awareness. keep an eye on the minimap, know when to back and get wards. If your pushing is luring a jungler to come and gank, then good! you will see him and back, making him lose valuable time (and also keeping him away from your random elo-hell mates)

Ideally, you want to take down the tower of your lane before the laning phase ends. But if you can't don't panic, the good part is now.

As the laning phase ends, if you did good (or atleast you didn't brutally lose your lane) the game is in your hands, literally. What you want to do now is:

Push and defend. push and defend, push and defend, push and defend. You don't want kills, assists or teamfights, you don't care about that. You want minions and towers.

As your team will be the usual bunch of baddies that will care only about k/d and never defends, you will be running back and forth from lanes, farming A LOT and keeping your towers safe. Don't waste time trying to gank or teamfighting early, whenever there is a nice enemy creepwave approaching your tower you want to be there and take all that xp and gold.

Playing like this will usually lead to a situation where your team will be turtling under a tower while all the enemies will try to push. This is what you want. If it happens evaluate if your team really needs you or if it can just hold under the tower. If it's the latter, go ahead and push the farthest lane from the enemies.
You will know exactly when to port back as you will most likely have vision from your team and/or the tower.

Doing this will drive the enemies crazy. If they keep trying to push you will take all their towers. If the come to catch you they will lose time because you will be back in time, and even if they manage to kill you, you are worth almost nothing because you won't be having much kills at all. You will be fed by the creep score.

As late game approaches and atleast the outer turrets are gone, you should be having at the very least your zerker's, stark's and mallet. Now you're pretty though to kill, really annoying with ricochet and just deadly with ulti + frozen mallet.

In teamfights, stay back. You want to autoattack the closest enemy to you, usually a tank. Do that, don't ever try to go into the mess and focus a carry, just attack the tank untill the ultimates are gone, then you can switch to a squishy.

The best part is that you will net a good amount of kills to your carries (you won't do much single target damage to get killing blows but you will do pretty good aoe damage) and will make cleanup the runners very easy and pushing after a fight super effective.

Why it works:

Simply put, most people in soloqueue/low elo are tards. They just want to kill stuff and don't really understand how important are creep score, towers and map control. With this kind of tactic you will turn the game in your favor by exploiting the bad knowledge of the game that the average player has. Taking down a tower is worth way more than a few kills. Making into midgame with your towers intact and the enemies' down is HUGE.
Taking down an entire lane while your team turtles under a turret is priceless and will turn even almost impossible to win games in your favor.

So what's the catch? the catch is Sivir's terrible early game. It's really that bad, it all depends on it. Should you have a bad early game you will probably lose the game for your team so it's really really important to know when you can pick Sivir based on who your lane opponents can be.

I'm writing this guide to instruct people on how to play Sivir in solo queue (or even premade if your mates are very bad).

This guide will feel weird and noobish to most people, but take the time to read the motivations behind the strategy and give it a shot before you judge.

Alright, the choices are pretty obvious here. ArPen reds, mana regen per level yellows and blue.

For quints, you can choose between ArPen, Flat HP, Movement Speed. your preference.

Almost like a standard 0/9/21 but with nimbleness and mender's faith. not much to explain here.

Heal and Teleport.
ok i'm already hearing the complains. why heal and teleport?

Simply put, Sivir's early game sucks. it's beyond terrible. And she can't really kill anyone with half a brain even lategame and if fed, so the usual choices are a no go for her.

Heal will give her a little bit more time in lane, and teleport will allow for quick trips early game and for some really lame split pushing late game.

Basically, you want to max Ricochet (W) first. Why not BB (Q) ? because it sucks. it's a terrible skill and it's useless.

Go with Ricochet and take 1 rank spellshield at level 2. then alternate between Ricochet and BB. If you are laning against AP nukers you may want to skip BB altogether and level Ricochet and Spell Shield.

Ultimate every time it's available ofc.

Here comes the first tricky part. Read carefully.

Start with a Dagger and a Health pot. At 950 gold (or 950+75 if there is a jungler and you want to be extra safe) port back and buy Berserker's greaves and Vampire Scepter. (and a ward if needed)

Teleport back into lane, farm another 1050 gold and when teleport is ready port back, buy a Recurve Bow, and go back to farming.

From now on port back only when needed, you want to finish your Stark's and then go straight for a Frozen mallet. Then the rest