Lee Sin is a Great champion. he is very versatile, But can be a little complicated for some players. it is good to be both aggressive and Def with him at the same time. But i'm not saying turret dive early game. Early game it is very easy to be taken down as him so be smart and agile while playing him. To me he does seem a Little Crit Dependant, but thats just my personal opinion.

Pros:
Versatile
Powerful
Great for Team fights and Ganking

Cons:
Squishy somewhat in the early game
difficult to combo with if your new to him.

My Spell setup:
I always take and because i feel that heal is a great spell for any melee champ. it's great for early game saves. and team fights. and i take Flash over Ghost because it's more of a personal choice i prefer it over ghost. But i do recommend taking or Flash always.

Recommended:






Not recommended:



Optional:





<-Only for Jungeling

When you first start the match you want to grab and 2 and head to your lane and begin farming. Once you reach about 1050 GP Bluepill home and purchase and . Then once you reach 1095 GP purchase and . once you reach 750 GP purchase . then after getting about 1337 GP purchase . Then continue to farm to 1195 and grab . by time you reach this point you should be pretty powerful and this should be about mid game time. The next item you will need is about 1315 GP, it is . Then save up and purchase . Then after you purchase that you want to grab . After this point will be your major GP saving point. it is best to kill the dragon, and coordinate a Barron kill if you can. by this point you should be shining pretty well. The next thing you purchase will be . Then save up 2230 and purchase your game changer The . now after this point you will save up and sale Wriggle's Lantern Then purchase . Do not purchase the last item until infinity edge has been fully purchased.

When playing Lee Sin try to spam Safe Gaurd/Iron Will as much as you can it does make a difference. it is great for team support and self survivability. be careful to only fallow up sonic wave with Resonating Strike when timing is right, If not it can easily get you killed.

Combos:
Sonic wave/Resonating strike too Tempest/Cripple Then Safe Guard back too ally
Input(Q-Q-E-E-W)

Dragons Rage too Sonic Wave/Resonating Strike Then Tempest/Cripple
Input(R-Q-Q-E-E)

Full Combo:(Requires Flash)
Dragons Rage too Flash then Tempest/Cripple fallowed by Sonic Wave/Resonating Strike
Input(R-D-E-E-Q-Q)

Group Splash Combo:
Sonic Wave/Resonating Strike too Tempest/Cripple Then Dragons Rage and Safe Gaurd back to Target ally Champion or minion
Input(Q-Q-E-E-R-W)

Note all combos are Situational. But these are what i have found to be the best and most Consistent Combos to Use.

Well I Hope you Enjoy my Build it Works Great for me and I hope it Can do the Same for you.
All comments are appreciated, Please Rate and enjoy.