This is a short guide for Lee Sin, meant to be short and sweet unless requested to be longer.

This guide is more for damage early game, then building Armour and heal later. The reason for blade of the ruined king is because combined with you're w, it gives massive life steal as well as its active, which gives you more opportunities to escape or initiate, and damage and heal on top of that.

When on the blue side...

For this build, I usually start at wraiths, then red, then go straight for mid to gank, if there is no oppurtunity to gank, I just q to a minion(to obtain level 3 since you probably will be border lined to leveling up) then proceed to wolves, then blue.

After that, I go top to gank and if there is no opportunity there, I take the enemies golems and then go back to base.

At base I usually buy vampiric scepter and boots when I b.

When on the purple side....

When on the purple side, I usually go get wolves then go straight for blue and ask for a smiteless leash(they will usually do this, if not then smite it and proceed to the next step)

Afterwards, I gank mid or bot, depending on the enemy champions(usually mid since he/she is alone).
Then afterwards, I go to wraiths and then red (at this time smite is probably almost off on cooldown). Then I gank top and go back to base and purchase a vamp scepter followed with boots.

In my opinion, the best boots to go when jungling is either mercury treads or ninja tabi, followed by the enchantments:

Homeguard
or
Alacrity

Thanks for reading my guide, and I hope you will dominate in-game.

And I am hoping to receive some constructive criticism.