Welcome to my guide on how to make a successful Irelia.
In this guide i will be showing you how i like to play Irelia. As you can see from the Items i have suggested this build focuses on life steal, and with Irelia this can work great.

Pros
-Great damage output
-Extremely hard to kill
-Can kill just about anyone :)

Cons
-if you get stunned and your not hitting the enemy, your basically dead.

I use Exhaust and Teleport but i sometimes use ignite instead of Teleport its up to you. i use exhaust because it can be really annoying when that kill gets away and i use Teleport because it allows me to not only push enemy towers but also defend my own with ease.
You could also use ghost as another alternative.

Since this build is a life steal build, most of the items are pretty self explanatory, but the frozen mallet is added in because with bigger hits you get more health back, you also get more health from it plus your hits slow the target :)

Early game
In the early game you want to try and get as many last hits as you can using Bladesurge is a great way of doing this because you get a portion of the mana back if you kill the target plus the cool down is refreshed. and if you take hits from the enemy just hit minions until it comes back.
Mid game
This is when you start to shine you will start getting kills and it is a good idea to start ganking as well.
Late Game
Now if you have done well and you are nice and fed you will be an unstoppable force, just dont get to kill hungry because it will kill you.

-When you are playing a life steal Irelia, remember that your ulti steals health, so dont just use it to get kills, you can get full health if you use it on a minion wave, and it can also help in team fights.
-Remember that equilibrium strike can stun if your enemy has a higher % of health then you and can slow if your health % is higher then theirs.
-When you have your Bloodthirstier you want to get that extra 10% of life steal asap, so killing minions with your ulti and killing Forrest creeps can be a great way of doing so.

I did not ad any Runes because i dont have any for Irelia. but crit chance attack speed armor pen and health are what i would aim for.