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.
I guess this is the first build post for Irelia. It might not be the best because I have not mastered her yet, but this will work, might not be the perfect build, but it works. Please post any comments you have to improving my build, it will help me be a better player and also help other people that will look at this build and try it thanks.