Hello, I have been playing caitlyn for a while now and i would consider her one of my mains. She is a very good champion once you master her escape mechanisms and what to do in various situations. She has very high damage output once she is decently farmed up.

Pros
- Amazing farmer
- Awesome Dps
- Good carry
- Easy to master/ play

Cons
- Very squishy
- likely to be focused
- Item dependent

The reason why I choose the runes is because you need armor penetration to make her very liable early game so she can harass very often with he Q and basic attacks. And the attack speed runes are also good because the faster you shoot the more dps!

Basic ranged Dps masteries not to much to say here

The reason why I choose these items is because infinity edge gives you tremendous crit chance and a lot of attack damage, and phantom dancers to move around faster and for the increased attack speed. You can expand on these items and and modify my build as you please but these are the items i would consider. I also sometimes stack a few doran's blades after getting my berserker greaves but it's all up to you.

Ghost and flash is the way to go because caitlyn is pretty squishy and you will most likely be focused in team fights and you will probably need to pop these summoner spells.