Passive: Flurry: After Lee Sin uses an ability, his next 2 autoattacks within 3 seconds gain 40% attack speed and return 15 energy each.
Q: Sonic Wave: Lee Sin shoots a wave of sound in a line, dealing physical damage to the first enemy it encounters and revealing it for 3 seconds. If Sonic Wave hits, Lee Sin can cast Resonating Strike within the next 3 seconds. Cooldown: 11/10/9/8/7 Physical Damage: 50/80/110/140/170 Cost: 50/30 Energy
Q: Resonating Strike: Lee Sin dashes to the enemy revealed by Sonic Wave, dealing a base amount of damage plus 8% of their missing health as physical damage. Cooldown: 11/10/9/8/7 Physical Damage: 50/80/110/140/170 Cost: 50/30 Energy
W: Safeguard: Lee Sin dashes towards a target ally unit, shielding them both from damage for the next 5 seconds. After using Safeguard, Lee Sin can cast Iron Will within the next 3 seconds. Cooldown: 9 Safeguard Shield Strength: 40/80/120/160/200 (+0.8 per ability power) Cost: 50/30 Energy
W: Iron Will: For 5 seconds, Lee Sin gains bonus life steal, and spell vamp. Cooldown: 9 Iron Will Spell Vamp and Lifesteal Bonus %: 5/10/15/20/25
E: Tempest: Lee Sin smashes the ground dealing magic damage to all nearby enemies and revealing them for 4 seconds. If Tempest hits an enemy, Lee Sin can cast Cripple within the next 3 second. Cooldown: 10 Magic Damage: 60/95/130/165/200 (1.0 Per Bonus Attack Damage)
E: Cripple: Lee Sin cripples all enemies revealed by Tempest reducing their movement and attack speed. The movement and attack speed recover gradually over 4 seconds. Cooldown: 10 Cripple Initial Slow %: 20/30/40/50/60 Cost: 50/30 Energy
R: Dragon's Rage: Lee Sin performs a powerful roundhouse rick knocking his target back, dealing physical damage to the target and any enemies they collide with. Enemies the target collides with are briefly knocked into the air. Cooldown: 90/75/60 Physical Damage: 200/400/600
(+2.0 Per Bonus Attack Damage) Cost: No cost Knockback Distance: 1200

For solo top Lee Sin, you always max your Sonic Wave / Resonating Strike first. Tempest / Cripple should be generally maxed second, but it depends on the situation. If you are laning with champions with high sustain such as Zac or Vladimir, Safeguard / Iron Will should be maxed second in order for lifesteal and sustain ability. Take points on Dragon's Rage on levels 6, 11, and 16.
For Jungle Lee Sin, you should generally max your Tempest / Cripple first. This allows for better ganking power with Cripple and to clear camps faster with Tempest. Sonic Wave / Resonating Strike should be maxed second followed by Safeguard / Iron Will. Of course, always take points on Dragon's Rage on levels 6, 11, 16.

Solo Top Tips:
-Take early points in Safeguard and Iron Will if you are up against a high sustain champions. Champions that include Zac or Vladimir.
-Using your Sonic Wave, Dragon's Rage, then Resonating Strike is a good way to 1v1 someone.
-BUY WARDS. As a solo laner, you must be aware that the enemy jungler will gank you a lot.
-Your strengths are in the early game to mid game phases. Be aware that you will gradually fall off in the end game.
-Make sure to be creative with Lee Sin

Jungle Lee Sin Tips:
-Start out Hunters Machete and 5 pots in order for high sustain and for clearing camps efficiently.
-Max your Tempest first in order for high ganking power and for clearing camps faster.
-Try to Safeguard onto the closest minion to the enemy and immediately activate Tempest/Cripple. Use your Sonic Wave followed up by Resonating Strike when the enemy is isolated.
-Your strengths are in the early game to mid game phases. Be aware that you will gradually fall off in the end game.
-As a tank, you must let your team get most of the kills. (Especially your ADC, because you will fall off late game and your ADC usually won't.)
-When starting your first gank, be aware that bottom lane is probably warded due to the enemy support.
-Try to hold 'Tab' and see which lanes bought and which didn't.
-Make sure to be creative with Lee Sin

Jungle Route:
I like to start at red, but it really depends on what you want to do. I choose red our blue, because that means my team's mid champ will have blue buff faster. Overall, it's really up to you.

Your starting items should generally be Hunter's Machete and 5 Health Potion. This will allow Lee Sin to clear the jungle camps much more faster.

Red Buff Route: Starting at wraiths to red buff is what I do. The pros of getting red instead of blue at first is that you will be able to give your mid the blue buff much quicker. This gives your mid laner a huge advantage in lane and could possibly win the lane. Red buff works well with Cripple.

Blue Buff Route: Lee Sin can also start at blue buff. If he does, Lee Sin can then clear camps much faster with extra cool down reduction. You could also gank with double buff which is really strong. However, you cannot die and give away your double buff. If you lose your buffs, your laner will have a tough time. Also, your mid laner will be getting blue buff probably later in the game until blue buff respawns. This gives your mid laner not much of an advantage early on, especially if the enemy mid has a blue buff.

I like to go 21/9 for top Lee Sin because Lee Sin has a surprising amount of damage potential. I take 2 points in Sorcery instead of Lethality and Frenzy , because I believe that cooldown reduction on Lee Sin's abilities are far more important than Lethality and Frenzy . Also, the cooldown reduction makes Lee Sin spam abilities quicker which activates Flurry which also refunds some energy back to Lee Sin.
For jungle Lee Sin, 9/21 masteries work well with jungle Lee Sin. The extra armor for clearing out the jungle camps is well needed for Lee Sin. You could also see that I get full points on Tenacious than Juggernaut , this is because it makes it easier for Lee Sin to escape dangerous situations with the reduction of crowd control.

I use 3 armor pen. marks and 6 attack damage marks for a reason. First of all, you need to have a good amount of armor pen. if you want to perform better late game. Lee Sin lacks late game strength, and enemies will be tanky such as Garen or Shen. You need to be able to do damage to those champions who get so hard to kill late game. The armor is needed, because you have to be able to survive teamfights while the enemy ADC will be doing plenty of damage to you. Magic resist to be able to survive huge bursts that AP champions have such as Fizz or Veigar. The attack damage quints give Lee Sin a more powerful early game which you have to take advantage of. Lee Sin has very powerful early game and adding attack damage quints add to that.

Flash and Ignite for Top and Smite and Flash for jungle. Flash is a must on Lee Sin in order to follow up on an escaping enemy with Resonating Strike. Flash also gives Lee Sin even better escapes. Ignite or Exhaust are good secondary summoner spells. Ignite for aggressive-ness and Exhaust for catching up to an enemy. Getting Exhaust works well when laning with Singed or Garen champions with high mobility. Smite is always need when jungling. Never jungle without Smite, ever.

For solo top Lee Sin I like to go more as a heavy damage dealer. I've seen many people go more tanky as Lee Sin top lane, but I prefer damage because Lee Sin won't be as bad late game if he has enough damage potential by late game. Bloodthirster and Ravenous Hydra are both good core items on Lee Sin. However i believe the Ravenous Hydra is better, due to it's 75 attack damage and it's unique passive has good AOE effect in teamfights. Frozen Mallet is also key for Lee Sin, because of it's 700 health and the passive slow make's it almost impossible to escape against Lee Sin especially when he has Sonic Wave, Resonating Strike, Tempest, and Cripple. Mercurial Scimitar and Maw of Malmortius are great items for Lee Sin if the enemy mage is fed. Building tanky with items such as Warmog's Armor and Runic Bulwark are also core items for Lee Sin. He needs to be able to survive late teamfights and not be as squishy since he will be in the teamfights headfirst.

For Jungling Lee Sin, starting out Hunter's Machete and 5 Health Potion are going to be your best choice. This gives Lee Sin lots of sustain in the jungle as well as clearing out camps fast. Buying Sight Ward is key, because you will need to ward your red or blue buff so that the enemies don't try to steal your buffs. Or you can play more offensive and place Sight Ward in the enemies' jungle and go counter jungle and steal their buffs. Sightstone is a very good item on Lee Sin because of it's extra health and wards it gives to Safeguard onto them. The Wriggle's Lantern should be one of your first items on Lee Sin because of it's armor in the jungle, lifesteal, and wards. You can now start building tanky such as Warmog's Armor, Frozen Mallet, Runic Bulwark, etc. The Last Whisper is a key item on Lee Sin if you are looking so armor pen. If not, Bloodthirster or the Ravenous Hydra are good items as well.

Pros:
- Lee Sin has great early game to mid game damage.
-Has Iron Will for extra life steal.
-Has great escapes with Safeguard and Dragon's Rage

Cons:
- Lee Sin falls off late game
- Lee Sin missing his Sonic Wave is a useless Lee Sin
- Dragon's Rage can knock enemies away from your team if you misclick.

-Using Sonic Wave, Dragon's Rage, then Resonating Strike is very useful when you are 1v1.
-Using Dragon's Rage when the whole enemy team is grouped up is a great initiation tool.
-To deny farm for the enemy, you can use Safeguard when they try to last hit, then activate Tempest for quick harass.
-Placing down a ward in front of you and using Safeguard on it is a great chasing tool and escaping tool.
-If you are getting chased in the jungle, you could use Sonic Wave onto a monster such as Baron Nashor and follow up on Resonating Strike to escape.
-If an enemy flashs before you use Resonating Strike on them, you can flash in front and activate it.
-Try to activate Resonating Strike later after you used Sonic Wave because it does 8 percent more damage based on their missing health.
-Try to auto attack in between abilities as your passive will create more attack speed and refund some energy back.

I've played Lee Sin since season 2, and I've learned a lot about his mechanics. Lee Sin never gets boring to use! There are so much combo and juking potential with him. I first played him when he was on free week, and my first game with him was not the best, but he was really fun to play as. I started to play him more and did well my first week. Luckily, I had enough IP to buy him afterwards. I've studied Lee Sin over the months and learned a lot from him! I've also found myself learning more about League of Legends. This made me become better as a player as well! Lee Sin not only made me better as a player, but also made me enjoy this game much more!