My guide to lee sin.

For the marks i took armor penetration to make damage on my enemies.
For the glyph i took decrease cooldowns because lee sin ability's take long to recharge.
For seal i took attack speed to increase lee sin attack speed or u can change it to armor seal.

I tookto decrease ability cooldowns or u guys can taketo increase attack speed.

I thinkis important item for lee sin because it gives u attack dmg, speed and its unique passive: physical attacks reduce your target's Armor by 15 for 5 seconds (maximum 3 stacks).

is a very good item for lee sin to recharge his health.

I tookto have more attack speed but u guys can change it to. if u guys decided to getget it after the boots.

i took Ghost to catch up with enemies or to escape from enemies. u can use it in team battles like u can run forward to an enemy then go infront of him and kick him back to your team mates by his ultimate stopping him from escaping.

i take Exhaust for slowing down my enemies and kill them.

Pros:
1- Good Damage.
2- Lee sin uses energy not mana.
3- Lee sin can help his team mates by shielding them or making them escape by kicking enemy back with his ultimate.
4- u have 7 abilities instead of 4.

Cons:
1- Lee sin is so fragile.
2- Lee sin ability's cooldown.