Lee Sin is a very strong attack damage hero. Lee Sin thrives at jungling and his dashes make him very mobile and deadly. Lee Sin struggles killing tanks due to their armor and health. Lee Sin burns energy by quickly comboing his abilites. Against tanks Lee Sin usually needs to gank with a teammate or has to chip the champion's health until you can go for the kill. Lee Sin is extremely strong against low health champions and champions with little mobility.

Lee Sin's Q is the main ability you will use when playing this champion. It is very strong and aa easy way to catch up to enemy champions. To dash with it you simply cast it and if it hits an enemy minion or champion it allows Lee Sin to recast his Q and dash to the enemy. Lee Sin's W is great for preventing damage and mobility. It allows Lee Sin to dash to an allied minion, ward, or champion. It can also be casted on himself to give Lee Sin a shield and can be re cast for some life steal. Lee Sin's E deals splash damage and grants sight on enemies hit. Lee Sin's E can then be re cast to slow enemies that were initially hit. Lee Sin's R is a very strong way to finish a kill, or push an enemy. When Lee Sin casts his R on an enemy champion it deals strong damage and knocks back the enemy champion. This can be helpful to hit a champion towards your team, finish a kill, or hit a champion away to give yourself time to run away or prepare for a gank.

The most common combo with Lee Sin is to land your Q on an enemy champion and re cast it, then casting E for the splash damage and slow. You can then cast your W to get away or shield yourself from damage. It is optional to then use your R if needed. You could also smite the enemy champion or nearby creeps/minions for health. A more advanced mechanic with Lee Sin is quickly placing a ward and immediatly casting your W to dash to that ward. This can allow you to catch up to an enemy without needing your Q.

There are several viable jungle paths with Lee. If you are wanting to reach level 3 before anyone else going Red Buff>Wolves>Blue Buff> Rift Scuttler. This route is very fast and allows you to reach level 3. It is best if you do not smite red at the start but rather smite blue. A full clear route is Blue>Gromp>Scuttler>Raptors>Red>Krugs. You can also do this full clear in reverse, if you do that start Red>Krugs>Raptors and then the rest of the full clear.

Dark Harvest

Dark Harvest allows for extra damage to champs under half health, this can help with AP and AD to do the most extra damage late game, this is very strong in the current meta.

Sudden Impact

Sudden Impact is very important on Lee because of all of his mobility. This grants extra Lethality and Magic Penetration

Eyeball Collection

This rune is very straight forward, the more the take downs the more the damage scale.

Relentless Hunter

This rune is also very straight forward, when out of combat extra healing is granted

Absolute Focus

Absolute focus simply grants extra damage

Gathering Storm

Also grants damage