Lee Sin is a very high damage jungler/laner who can dash in and out of fights he can gank very well and sustain a lane good which makes him great 2 have 4 ur team This is my first build and i am blademaster013 i did lee sin because i play him alot as a jungler and his high dps and ganks are the reason he is called the blind monk

I focus my runes on armor penatration for people who stack armor and also damage which is lee sins main thing is high damage out put so i focus on hitting hard and hitting harder

I follow a standard 21-9-0 masteries for offense i mainly focus on attack such as damage life steal attack speed and in defense i take armor and magi resisce which also scales with lee sin armor and magic pen

Start with a cloth armor and 5 health postions for health regen wit the potions and defense with the cloth armor.
Next start building things like Wriggles Lantern and Mercery Treads for armor and magic resistance
Than go into late game items focusing on Attack Damage and Crit Starting with items like
Last Whisperer, Phantom Dancer,
Finally late game grab for crit Infinity Edge and Yoummunus Ghost Blade

I start out with a point in e for damage, Next take w for a shield and the life steal, Right after take q for damage and having all three spells by 4 u should be soon starting to gank so max q the main source of damage as soon as u can get ult at 6 12 16. Max w second for survivability and life steal. Finally max e last

I choose Smite for jungling and taking red and blue buffs quick and it verys between ignite and exaust but i choose exaust for slowing down and helping in fights

Pros
High D.P.S
Good ganking ability
Amazing jungler
High ad late game
Sexy Skins
Cons
Item Dependant
Hard to Master
If not played right easy to counter

Lee sin is very strong ganking because of his skills he can jump in with q dealing damage slowing with e and when u get the kill w too saftey
Also jungling go in the middle of the camp shield yourself and than cast e and q and kill the camps