Lee sin is a great sustainable bruiser (off tank DPS). He can hold his own in a fight as long as you keep him moving. Lee sin has mobility use it to your advantage. With an enemy such as Nasus, you need to keep him on his toes. use the brush and you Q to hold him back. If you are top against Nasus (not recommended) then try to get team ganks. You want to hold off Nasus and get your kills. Lee sin is played as a bot character for he can slow and hold on to enemy's. Use you ability's to activate you passive.only use 1 ability per 2 basic attacks unless necessary.

You start with E because it allows a good slow to early game as long as you can get that start you may get kills for holding. You then want your Q for the fact of closing the gap. If you can use your W to jump to a teammate Then Q to jump to the enemy and then flash in front of them then R to kick them back into your team you basically secure the kill. With your w be sure to have teammates close. If not then you have no way to run in/out of a fight quickly.

1st: Gap closer
2nd: ultimate that secures
3rd: amazing slow
4th: can do everything
5th: Has sustain

1st: if not high in creep is easy kill
2nd: no team no lee sin
3rd: weaker late-game
4th: Can crack under pressure

You will need to depend on a team. If you cannot depend hardly on your team early through late game then you need to farm. Take jungle and farm your bot lane as much as possible. You will need to gold to build faster getting the sustain needed to backpack your allies (carry). As soon as you reach the trinity force you can start initiating on the enemy with your weak team and win. Use you passive and abilities smart and you can carry. If the problem is the team doesn't help at ALL Then continue farming till you reach Black cleaver. Then you may be able to take them on 1v2 and get out alive (unless its the enemy that's most fed then only 1v1). If the enemy has a strong armor building tank and your team is high AD then get black cleaver then ravenous hydra so you can tear away armor and allow extra damage to infiltrate. If against a high strength AP team you can replace Something with the Mercurial Scimitar For high damage and MR.

I Realize there's not much to this guide but less is more. I may not be the greatest lee sin you'll ever see but i feel i am the best lee sin out there. With lee sin you just wanna have fun. Early game try hard to have fun. I run around yelling RAWR!! and BARK! because i just wanna have fun. That makes me do good and have a laugh. Also with serious players who try hard to win... Don't even bother changing the plays. They can be serious and stuff but really it comes to you because you are only as good as you want and as your team. If they start failing Back pack them. If they farm jungle use Q then E when the jungles low to steal the jungle for the more efficient farm. If all else fails ask me other questions at my summoner name Littlewolf98 i will be glad someone read this and cares to wonder more.