Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is my build for 5v5.
I have a 87-62 w-l developing this build with 1121-604 kill-death
It works quite nicely. It is an only slightly modified from DEWO's Jungle King build.
The build is less mana intensive than DEWO's and focuses more on building your basic attack. This allows the player to be less dependent on the golem buff and allows you to be less predictable. It also makes your character considerably more powerful than DEWO's late game.
You will also notice a lot of defensive items late game. This is to allow your character to stay in the fray longer and survive being focused. As much as ww is an ambush character, he is also heavily focused which means even though you don't present yourself as a gank target or initiate fights you still need to be able to take punishment.