I jungle Lee Sin semi-regularly but I still haven't found a build I absolutely like. I checked guides on multiple sites, none of which worked for my play style.
Stuff you'd want to know, I have AD Marks/ Quints, Armor Reds, MR Yellows, and 21/9/0 masteries. (I absolutely love the clear speed in 21/9/0, I can often get a Smiteless blue and get the other team's red level 2.)
Anyway, builds I'm playing around with right now are Wriggle's Lanturn > Giant's Belt > Frozen Mallet/ Warmog's Armor > some more tanky items as needed (Hexdrinker?). (Games don't often last long enough for me to get a full build.) I definitely like building tanky, but both Warmog's and Mallet are very expensive, and this hurts my mid-game damage output.
What would you suggest?
tl;dr: Tanky jungle Lee Sin build with 21/9/0 Masteries?