I use AD Marks, Armour Seals, MR Glyphs and Atk Speed Quinns. (standard for my ADC's that rely alot of AA's)

For my masteries i run 21/9/0 i screwed up when making the guide so just made your defensive masteries based on who you are laning against.

For spells i use the most common for adc's which is Flash and Barrier but use ignite instead if you want to play aggressively.

The Core build i have in this guide is a safe build to make i do recommend it for low elo players, most more advanced players love to use alot of crit dmg with caitlyn but it depends on the situation you are in.