I've been maining Lee Sin as my jungler of choice as of late if the team has CC covered. His level 3 ganking reminds me of Nunu when he was in his prime. His burst is insane, and the amount of skill points you get when you combo his abilities correctly is pretty good too.

Mind you my build changes from game to game, but I try to keep my core items the same. His scaling is really good, and base damages are stong as well.

One of the best tips I can give to improve your play with Lee Sin is to learn how to Self Cast (Default is Alt and the skill) and also is Smart Cast (Default is Shift and the skill). Self casting while jungling with just place the Safeguard / Iron Will shield on yourself. Smart casting will fire Sonic Wave / Resonating Strike towards wherever your mouse cursor is.

For runes, I run a bit abnormal build. Flat AD everything, and ArmPen Quients. This gives you a lot of early game burst for ganking.

The standard Smite / Flash combo. Provides easy jungling and a good utility spell.

I take one point in Safeguard / Iron Will to start jungling, along with one point in Tempest / Cripple for the reveal/slow/AOE damage. When I hit level 3 I get Sonic Wave / Resonating Strike and gank a lane.

I prioritize Sonic Wave / Resonating Strike followed by Safeguard / Iron Will. I do this to help with early to mid game ganks, to help bring a bit more utility and help to whatever lane I am ganking. It also helps with the increased life steal to battle, then go out, grab some HP from a near by neutral camp, and then go back into the fight.

Of course get Dragon's Rage every chance you get. Nothing is more satisfying then Dragon Kicking the **** out of someone. Just make sure you don't save anyone with it :)

The core of my build is Wriggle's Lantern and Mercury's Treads. Sometimes I will switch Mercury's Treads for Ninja Tabi if it is a AD heavy team, but if that is the case, you probably already won.

After that I go with the good ole Fratma's combo. Frozen Mallet + Atma's Impaler will give you tankiness and damage. Your base values for damage are already pretty good up until this point, because of runes and masteries.

After Fratma's is usually when my build starts going more towards whatever the enemy team is comprised of, and who seems to be carrying them. It's usually Hextech Gunblade for more damage, and also the spell vamp is incredibly good with your nukes. If you need to be a bit more tanky, then usually it's Force of Nature or Warmog's Armor. I've even gotten Thornmail a few times.

A lot of people will suggest rushing Trinity Force I used to do this as well, but started going with the more tanky approach. Trinity Force is still a fine item, but I usually get it a lot later in the game then I used to.

If you are a jungler, you NEED to gank. This helps everyone when you do this.

When ganking as Lee Sin I have found out that you don't need to blow Sonic Wave / Resonating Strike or Flash right away. The best thing to do is Safeguard / Iron Will to a creep near whoever you are ganking followed by a Tempest / Cripple. At this point your enemy will either A) blow flash, which you can then just Sonic Wave / Resonating Strike to them for the kill or B) They will just Die.

One thing to try to work on also is making sure if you Sonic Wave / Resonating Strike for a kill near a tower that a friendly creep/champion is near by to Safeguard / Iron Will back to early on. You can also drop a ward to do this too as well if you are able to.

With Lee Sin your jungle is pretty open and free form. The route I take allows for pretty high HP by level 3 for a gank. I start at Double Golems, where I smite the first one when it is around half HP. I continue to Wolves, and ending at Wraiths, where I smite the Big Blue one, and just kill the rests.

After killing Wraiths, I head to a lane, and gank. Most of the time it seems to be mid or bottom. After ganking early, you can go back and get boots or cloth armor, and pretty much just clear the whole Jungle.

After going back the first time, I tend to just gank every lane and just continue jungling without going back. It's not rare for me to go back with Vampiric Scepter and Boots and just full buy the rest of Wriggle's Lantern and a Giant's Belt or Mercury's Treads.

One thing you should be aware of is how to use Lee Sin's passive Flurry effectively. Basically you want to use an ability every 3 seconds. This takes a bit getting used to, but once you get it, it becomes easier. This also helps with other champions that you might play in the future that uses Trinity Force as a core item, as you don't waste procs.

I hope everyone enjoys the guide. It might not be completely original, but it's how I put together Lee Sin. You can smash normals with him, or win ranked. He is one of the more interesting champions, and is a hell of a lot of fun to play.

Please leave comments with any questions that you have, and I'll be glad to help.