Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Caitlyn is a carry range dps. I have seen many caitlyn though much games till now... i tried this build it was really succesfull(i can say is the best build till now for me).DONT EVER TRY Caitlyn with Chalice of Harmony or Manamune you will totally fail thats why i put on caitlyn Greater Seal of Replenishment you will always have mana for the right situation... anyway just try this build i give you.Trust you will go well xD
AS she is a ranged carry dps give her the Greater Mark of Desolation.This marks will help you much at early game against APers and the Tanks.As Seals put Greater Seal of Replenishment and you will always have mana for any situation.