This build will focus on making Xin have a lot of attack speed early game to take advantage of his passive which gives him a decent amount of health for every 3 hits. Later on he will be tanky and pack more damage. This build is most definitely not for jungling.

For spells i like to use: FLASH & GHOST because they are good for tower dives are great for chasing down enemies and running from ganks.

Other spells that work good with Xin are EXHAUST & IGNITE

The idea of these items are to start of Xin with alot of attack speed just without the runes you should be at about 2.2 . If you are doing very very well in your game and are having no trouble taking down enemies you may want to consider changing your blood thirster for The Black Cleaver this will allow for even faster farming and you wont need the health regen from The Bloodthirster if you are easily taking out enemies. If you aren't doing so well you may want to consider getting a frozen mallet instead of The Bloodthirster since you already have health regen from your passive, more health will give you an advantage over squishy characters and will help you escape from repetitive ganks. If the blood thirster or frozen mallet isnt working for you try something with a lot of damage because this build should give you a very very high crit chance.

The runes basically focus on attack speed, damage and armor penetration. I see people get speed quintessences for but he is already very very fast. Plus if you use my summoner spells escaping shall be even easier anyways.

Xin has alot of uses for a team; during team fights xin has to be a big source of damage to enemies. With this build though, Xin can be a very fast pusher and backdoor to take out many turrets.

These masteries focus on Xin's deadly side rather than his tanky side. If you want to play Xin more tanky you should consider putting more mastery pionts in defense.

Xin isnt much of a farmer until after level 6-7 this is where the laning game begins to come to an end and Xin is giving alot of chances to push heavily and backdoor. if you are trying to push fast you do not need to stay behind your minions; just put out some spells and you could take the whole group before your minions even arrive. this will cause a major back-up of your minions making the turrets take major damage whether your there or not.

This build turns Xin into a fast tanky deadly enemy that will take the whole enemy team to kill. :D Good Luck.