This Caitlyn build is for early game Caitlyn and solo lane on twisted treeline or top/bot lane whit a tank as your team mate on this lane.

I choose flat attack dmg runes for early dmg and attack speed runs so i don't need to rush phantom dancer. The armor makes you able to fight your enemies in a better way becouse i think Caitlyn is a little bit too easy to kill. The mana runes gives you a possibility to use you abilities more.

That i buy blodthirster as my first big item is for giving my ulti more dmg and making Caitlyn stronger in fights. I try to buy much attack dmg quickly to get the start of a really good dmg output on my enemis.

When you farming whit Cait try to use her long range for stay in bushes and shoot to trigger your passive quicker and getting much easier last hits on the minions.