Yea, how do you build Irelia in S3?

Like I always build her: 6x Phantom Dancers. She can control blades through magic, so the more blades the better, amirite?

Seems poor, why not get 6 more blades and run trinity?

start with cloth 5 pots (finally you can do it and not get punished)
phage->stinger->triforce->zephyr

take ghost and exhaust for more as*kicking awsomeness

And than the usual defences as needed

well -- trinthy ghostblade zephyr wits end still rapes on her -but dont build those all 4
... and spirit visage randium

9,21,0

Boots of Swiftness
Zephyr
Phantom Dancer
Black Cleaver
Bloodthirster
Triforce/Hydra/LW/Ghostblade

DPS, 'cause fukk da police!

(Downvoters need sense of humour. I wish they got one already because it's tiring to include this disclaimer all the time.)

-Boots of lucidity.
-Zephyr
-Trinity Force
-Guardian Angel
-Raduins Omen
-Maw of Malmoritus