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.
Well, this is my very 1st build so don't judge too hard.
-Extreme burst dps
-Easy and fast jungling
-With golem buff you can farm minion waves really fast
-Not so squishy
-If careless, you die fast
-Probably 1st target in team fights
-Too dependant on trinity force
So, you start by grabbing Doran's Shield and a pot.You should stick to your lane long enough to be ready to buy Berserker's Grieves on your 1st trip back.Remeber to play defensively as you have no real way of harassing your opponents.If they get too cocky, a stun plus a little help from your true dmg and your teammate can get you a kill. Be careful not to start things yourself though.
At least until you get Sheen you are supposed to stay back and charge only when you are 100% sure you are going to get the kill in less than 3 secs.Just because she looks like a ninja does'n mean she is.Not until mid to late game that is.
Once you get Hexdrinker you are free to gank anywhere you please.Its passive will most likely keep you safe from situations where your gank is not fast enough and the other team cathes up, so its up to your skill to get the kills fast.
By now you should be around lvl 12 trying to get that Trinity Force.Jungling at this point in the game is highly recommended though it might be hard cause teamfights will start to pop more often and your help will be needed.Your No.1 priority is your team, so suspend your jungling experience and go help them.If you are good you might get a kill or an assist and get the gold you tried to get through jungling.
Once you build Trinity Force you're in for some nice teamfights.You are still not allowed to initiate but strike their carries and CC while their attention is elsewhere. If your timing is right, you should frustrate their targeting enough for your team to take the advantage.Save your stun if you get chased, use your ult if you get to chase them.
Stark's,the Black Cleaver and Sunfor Cape just add a nice teambuff, more dmg and make you survive longer.Also Makes you turn the jungle into a playground.Just remeber to take the backdoor in teamfights and you'll be fine.
Irelia is not easy to master, but when you do, she's damn sexy. (^^,)