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.
This is how I build and play Irelia. Its fun build, a whole differant play style then any other build for her. It has its perks like more survivability through much more ult damage then AD Irelia can provide, thus meaning more healing from it. Equilibrium Strikes will be hitting for 1kish, plus then next melee attack after that is like 500-700 damage, plus the damage from your Q ability to initiate, then melee attack for 500-700. This build has insane burst. I'll add more information to this build later, if people like it. It's still in the works and testing stage will be finalized soon enough though. Don't knock it til you try it.