My Jungle Shen Guide
The build :
------->
------->
-------->
-------->
--------->
------> Into defensive options.
Defensive options :

Why would you play Shen jungle, you might ask. Sure, his jungle clear is not the fastest, But, with the heal of his Q and his shield, he can clear the jungle without getting hurt too much. Shen jungle has great ganks, great counter ganks from level 6 and onwards and can deal with counterjungling quite well with his E as an esccape.
Now, you must be asking yourself "Wtf is this build tho, yo". So here is what this build does :
-
First, Cinderhulk, I don't think I need to explain this one, Shen+Health=Results and it helps him clear the jungle faster.
-
Then, Frozen Mallet, which I think is a very underrated item. You get a little AD (never hurts), a permaslow, which helps with the lack of CC Shen has after his taunt , and a crap ton of health that synergizes with Cinderhulk and Shen himself.
-Then, the odd one of the lot, The Blade of the Ruined King. Why would Shen want that? This item gives Shen everything he needs except health. Dueling power, life steal, a slow, attack speed to pop his passive more often and the damage he lacks. This bring Shen's splitpushing to a whole other level. This item combined with Skirmisher's Sabre and the damage reduction from the taunt allows you to outduel a surprising amount of champions and the perma slow from the Frozen Mallet allows you to usually finish up the kill. And if a teamfight breaks out, you just pop in there with a huge shield from anywhere on the map, which makes you one of the top splitpushers in the game.
And then the defensive items, which are situational and self explanatory.
The rune page should be based on attack speed and some tankiness and the mastery page should be full tank.
Pros of the build : Doesn't take that much damage from the jungle, amazing ganks, great duel potential, amazing splitpushing and amazing counter ganks after level 6.
Cons of the build: Somewhat slow jungle clear, needs to snowball a little bit for the build to be truly effective, has a hard time dueling junglers early game.