Caitlyn is an early game boss. Long range makes her excel at farming and harassing at a safe distance, strong passive that meshes well with flat attack damage, critical strike, and attack speed. In addition, she has traps and an escape spell. Very, very sexy champion.

For Runes, check the above list of what I use.

Explanation: With this rune page, I have 8.6 AD and 22 Armor Pen added on to my base stats, masteries, and starting item at level 1.

With her long range, she is going to (excuse me) **** the enemy. The damage is ridiculous.

I go with a 21-0-9 Mastery Build. However, only the 21 points in offense is essential. The other 9 points can either go into defensive tree or utility. With this set up, you add on another 6 points of armor penetration and 3 points of attack damage.

Despite what the item list says, the starting items can be fairly option in my build.

There are multiple paths:

Doran's Blade, Boots, Infinity Edge

Boots + 3 Health Pots, Doran's Blade, Infinity Edge

Doran's Blade, Doran's Blade, Boots, Doran's Blade, Infinity Edge

* In bold is the starting item(s).

As an AD carry, I can't stress how important it is for Caitlyn to farm well. When I say farming well, I mean by being efficient. If there are fights/objectives (towers, dragon, baron) going on, help out your team.

In addition, double buffs make Caitlyn a god in teamfights. While blue buff is not a must, it is still very nice on her.

Position well and you will deal tons of damage in Solo Queue. Be wary of various gap closers, however.

Good luck and have fun with Caitlyn! ;)