This guide is about jungling with Lee Sin, hope u gain some idea from this guide.

Boots wise, if your opponents have 3+ AD champs go for the ninja tabi which is great for dodging right clickers, if they have 3+ AP, go for the merc threads for more magic resist and tenacity.

In this build, Lee Sin will be built as a offtank champ, this build not only makes him sustainable but at the same time a force to be reckoned with. With Frozen mallet to slow enemy champs down with every hit, and atma's to further increase its AD and providing extra critical and armor at the same time. Bloodthirster for lifesteal and trinity force for sheen's effect and movement speed makes this build a gd sustainable lee sin.

This is how I start my jungling route..
Double Golems--(Make a gank at btm or mid at level 2 if possible:easy 1st blood if resonating strike lands)
Wraiths
Wolves
Recall
Double Golems
Lizard
Wraiths
Wolves
Gank
and it goes so on and so for....I would recommend a dragon immediately once u get ur wriggle's lantern, this is to ensure ur team a good early control of gold.

Remember to use Lee Sin's passive to your advantage during jungling to attacking a turret, be sure after using a skill, allow lee sin to run out two hits before activating another skill, this is to maximise lee sin's attack speed.

Lee sin's roundhouse kick deals lots of damage, try using it to push ur opponents back to ur team mates during a gank. During a team fite, try to isolate their carry by kicking it out of position, or try to land ur roundhouse kick on as many enemies as possible due to its high dmg and knockback.

Lee Sin's safeguard/ironwill can be used for ward/teemo's mushroom jumping, allowing him faster escape and movement around the map. Tip: when you are doing dragon alone during ur early levels, plant a ward with ur wriggle's at the top of the cliff, this is to enable u a fast escape when enemies spotted and wanted to go aggresive on you.)

Lee Sin's Tempest/Cripple is a great skill to go against DPS enemies, e.g Tryndamere. It is a great skill as it is causes an AOE to nearby enemies and causes them to be slowed and reduces its attack speed greatly, use it to ur team's advantage.

In all, Lee Sin is a great champ to have fun with, and I hope you guys enjoy your time in the fields of justice!