I've mained Lee Sin for a very long time. I've tried multiple builds on him and found one that is very efficient. Also, realize that the brutalizer can be easily replaced with Wriggle's Lantern. With the early damage from Brut, I am able to produce massive amounts of damage. Then, directly after the awesome early game item I go for survivability. Atmogs compliments him greatly. The IE at the end of the build is only for luxury and it is a controversial item at this point. Standard games I will get the IE, if more of a certain stat is needed I will get a different item to replace it. This build has gotten me many insane K/D games in normals as well as ranked, several even 30+/0. I find health to be much more efficient than the classic Lee noob rolling life steal. Offtank over dps for team utility. His utility is also awesome.