Well Guys welcome to my Stonewall008 inspired Lee-Sin Guide.
On this Guide I will focus on jungling and not that much on Laning.
I personally think that Lane-Sin is a strong pick but not as strong as Jungle-Sin.
Enjoy and have Fun reading this guide.
It is still under construction so please give me constructive criticism.
Btw: My English is not that good.

Pros:

Very Fast clear Time
Control Jungler
Viable
Surviabillity in Jungle

Cons:

Hard to play
Harder to master
Takes much time to get into his mechanics

For Runes I pick:

3

Flat Ad Red
6 Armorpen Red
9 Armor Yellow
Choice Blue (I use Flat Energy Blues)
3 Flat Ad Quints

In my opinion these runes fit best for Jungle Lee sin.
You gain jungling Speed and good gank potential.
The blues also help you to do your full combo without draining out of Energy.
Remember: The Flat Energy blues are

For Masteries I pick 21/9/0
Because this is kinda the best Mastery i know for any Jungler I think.

The first item is a Dorans Blade because it gives you Damage, Sustain and Lifesteal.
I follow up with 2 other Dorans Blades but you can also build a Wriggles Lantern.
The following items depend on the Enemy Team.
Against a heavy Ad Team: Thornmail, Frozen Mallet, Atmas.
Against heavy Ap Damage: Force of Nature, Warmog, Atmas.
Against tanky Team: Trinity Force, Black Cleaver, Atmas.

I personally dont like Trinity Force on Lee-Sin but because I have seen many Lee-Sin's that somehow rocked my *** with that one I add it in too.

I try to mix Hp items and defensive items on him and play him like a "Get out Son" Champ that has good Utility in Teamfights and can peel off those pesty people that want to kill my Ad Carry.

Just try to Kite them Around as much as you can and wait for Energy to finish them off.

I try to Max out my Sonic Wave/Resonating strike first because it helps you more to gank and kill the Buffcamps but you can also Max out Tempest/Cripple for better Control over the small Camps. Just play around and find your personal best Way because this Guide is only a small inspiration for you Guys and not a Way to play Lee-Sin.

Start at Wolves
Head over to Blue (Give it to your Mid)
Go to Wraiths
Back to Wolves
Kill the Red Buff
Kill the Golems

And dont forget to gank.

Just watch his Video: Play Video

ALWAYS wait 2 Autoattacks before you use your next skill and dont forget that you can use Ironwill+Smite to get hp.

Just go and try out the Build.
Please give constructive criticism and dont Troll around