Hi, I'm Levbrien a Lee sin main from OCE. I have been playing lee sin for a while now and it feels like its been long enough to show off some of the best builds that I i have found, Built, And demolished. First time i played League when i was young but didn't. start playing it seriously till about 10 months ago. Lee Sin was one of the first champs i found interesting and really wanted to master.

Lee Sin Basic Full HP gank combo (Pre Level 6)
Ward hop > E > E > AA > Q > Q > AA
With this combo they should below health by the time the Q has hit.Your teamate should have helped if not you had definitely got there recall.

Lee Sin Half Health Gank combo (Pre Level 6)
Q > Q > E > W > AA > E > W > AA
This is a extremely easy combo. After small amounts of practice this should be muscle memory. This combo can be used if a enemy is half or minimal health. this combo is a execute if your laner cant finish them.

Lee sin Ult Gank combo
Ward hop (if needed) Q > AA > E > R > Q > E > W > AA > W
Once this combo is finished your teamate should have done enough damage to kill them or you killed them with the combo alone.

From front of Opponent
R > Flash
This combo takes practice but after a hour in practice mode it should be perfected and you'll be able to front gank.

Lee Sin is a early game powerhouse. And once you get a lead with him. There is nothing that can stop you. Getting that early lead with lee sin is vital. And the best way to do it is the strategy following.

Early game Farming.
On blue side you will want to start blue side with your W. With tops help Blue buff should be done in no time. Learn your Q and go straight to enemy red buff. Take that using smite. Go to scuttle then straight after gromp and wolves. By now you will be ready to take raptors and krugs. Or you can go for early ganks. Try and find the enemy jungler by now and start doing some counter jungeling. Mattering on jungler this path may be altered. I have a guides on most junglers you'll vs in this meta.

Whilst on Red side this strategy can be done but in a even better way! After taking red go straight to the enemy blue. Ward the entrance into the jg on the right. Take wolves and gromp if you can. then go straight to normal jungeling krugs, raptors and your own blue wolves and gromp. P.S Gank if possible at anytime during this route GANKING is key to being a jungler.

Mid game
Mid game is either the easiest or the hardest part of playing lee sin. You are either snowballing or not. If you aren't fed then your job is to kick enemy's into your team to feed them. Your kick is extremely powerful even if your behind so keep that in mind. If your fed mid game. Get objectives you want them. It will put you ahead even more.

Late game
Late game is either a breeze and you have secured the match. Or hell. Focus on stealing objectives and feeding your team. NEVER try and secure kills for yourself if your behind at this point in time. Feed it to your hyper carry or tank that can peel in fights and keep everyone alive. In situations like this you may not be ahead but don't give up on the game. If your fed. Try and have some fun with combos Like
Wardhop > Q > Kick (into enemys) > Q > E > W > E > W > AA = PENTA KILL.
This is a basic guide into the world of Lee Sin. I hope you learnt something. any advice please let me know. GLHF :)