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.
take ghost here in order to get to and from fights as well as the obvious use of running the hell away. clarity is not so much for you (though it is nice) but for your team mates using that next to an oom caster can suddenly turn the tides of battle allowing them to unleash their arsenal once more
i went with leveling the shield in order to maximize your teammates survivability you take the gale at level one for the knock up and then leave it there the zephyr at level 3 for its passive and the slow to help teammates chase. with this build you never want to find yourself caught alone always stick to another champion.
for team fights what you want to do is initiate with your gale as the tank is initiating try to use hit someone your tank isn't initiating on in order to maximize the control of the other team from there just try to help control the battle with your slow and gale whenever its up and shielding whoever needs it and don't be scared to use your ult if you think people might die your team would much rather you accidentally use it when its no necessary then to not use it at all when it is
in summery very support based, try to stay near the back of team fights and avoid getting ganked