Hello to all who might read this guide. Let's get to the chase: I have played several games so far with Lee Sin, and this build might have been the best I used. I used it since I made it, which is for 2 weeks. This build is immensely powerful - which I will depict in the next couple of chapters. I am also not an expert with photoshop or BBCoding so don't expect something fancy.

The reasons I picked the runes above:

I get fairly amazing starting defense, and a little bit more damage on the side. Helps through Jungle without Cloth Armor.
When ganking, they feel so vivid and you feel the HUGE difference between this and No runes at all.

You can obviously go with every other Lee Sin recommended Rune Page - but this is my favorite and the one I use and suggest you too.

For the masteries, I have no real explanation except the fact they are my personal pick, and I find it better because of (reasons). Again, You can also go with the other things people here on MOBAfire recommend - Your choice.

Lee Sin is a powerful Assassin Tank, Which I am sure you are aware of, a fact that makes him an amazing jungler \ roamer. In Early game, pick up the Red buff, move up to the wolves, and gank top immediately. Grab a kill for you or your teammate, but DO NOT DIVE.You are not as OP as you think at level 2. Just not. Afterwards, casual jungler play - At about the part where you have Atma's Impaler, You move up to aggressively invade their jungle after each teamfight you survive - Prevent any farm from their team. If you can, plant a ward near where you want to steal, and use Safeguard on it to run if you are spotted. And by aggressively, you also move up to push their turrets where you can - Don't waste time, SHOOT ALL OF YOUR MONK-ISH LASERS AT THE MINIONS, and push the heck out of their Turrets. Your team will thank you eventually.

In short - You are a Tank, that deals heavy punishment, and can suffer as much as punishment. Your attack damage isn't amazing, but it is very powerful when you use your abilities. And most important - Have fun! Don't get discouraged by d-bags or sucky games.

Pros!

You are very durable.
You deal heavy damage in 1v1`s, even greater when you have your Ultimate inside a teamfight.
Double damage from your Q - Unfair!

Cons :\

You can't win 1vs#. Sorry about that.

All you have to do while playing, is the standard stuff - Shield your almost dead partners, Kick people away from your carry, Slow chasers, Heck, sacrifice yourself so your carry could survive when you think you can take the beat of it, around minute 35ish.
That's all I have to say really.

Of course, all things here related to their song of Lee Sin, are their own, and not mine, I did not write these lyrics, and on top of it all I want to say I love them and this song inspired me to sit here and write for so long. If you haven't heard them yet, here's the song of Lee Sin - Enjoy! http://www.youtube.com/watch?v=eA04nbviQ8E&feature=BFa&list=PL964005A0D6CDB25C&shuffle=402771