hello, this is my first guide. its more like me showing you my build, but ill try to help answer any questions you might have in here.

i play lee sin fairly tanky, late game he is very difficult to kill, since he has so much health and armor, and on top of that he has built in life steal and the bloodthirster. so the masteries provide better survivability for early game and that allows him to level well and farm very well.

the health potions again let you stay in lane and farm/ collect xp early. the wriggles gives you more survivability with health steal and armor and gives you free wards to prevent ganks, nearly perfect for the blind monk. after you complete the build you sell the wriggles for a bloodthirster, and buy all the elixers when you go back.

i max his e first to let me farm really well, ive been thinking about maxing my shield second to give more lifesteal but so far this is working. after you reach level six, you can go jungle around if your lane is secure with your lane mate. when using your skills against an opponent, the way i found best is to shield yourself at the beginning of the fihgt, and reactivate giving you lifesteal. if you have trinity force you will auto attack them once. then use you tempest, reactivate to cripple and slow them. auto attack again and use you shield again and hit to proc your lifesteal/tri force. then use your sonic wave/summoner abilities to chase.

i roll with ghost/flash which in my opinion are the best summoner spells in the game. they allow me to chase down opponents, escape, and if i play it right jack my opponents baron and live :)

so thats my build, any questions or suggestions let me know, have fun with the build and good luck

lee sin can farm extraordinarily well, using his abilities. he can shield him self, and reactivate his shield to give him life steal and spell vamp. from there, you use your tempest and damage minions in the area. then you can just finish them with basic attacks.

generally at level three you can get blue/red and level 10 you can get dragon. make sure to time out and take advantage of dragon as much as possible so you give your team a gold advantage. after level 14 you should be warding baron with your wriggles until you get your blood thirster. when you do this, it allows you to steal baron. to do so you hide behind and wait. when its about to die you use your sonic wave in, tempest, get the kill and use your flash to get out. or you can have an ally hide wher eyou came from and use your shield to get out. either way works fine.