Jungle jhin may not be the best. Its not even good for most of the situations. But clear is good. You bring long ranged cc and damage. Not to mention 4th shot damage that deals more than smite like all the time. So you are like a ranged nunu. also you will be mobile with the build of mine...

Pros

Good Clear.
Ranges cc/damage
High damage.
Double smite with 4th shot
Early to Mid game bully.
Hard to vs.

Cons

No hard escapes.
Can be counterjungled.
If focused you are not guaranteened to live.
Squishy

You need to start with Hunter's Machete and 3 potions. Also start with your E ability and spam it to the golems. Its pretty good. Then do the red and wolfs-golems. etc. In your first return you should be having Skirmisher and boots. Also you can always gank anytime. No need to be scared.

After you finish your youmus, you are a beast now. The reason is? Because with youmus and warrior enc, you will be having flat 30 armor pen. It will do so much damage to pretty much everyone in mid game. That active helps you gank better and increases your damage. And you get a free %10 cd. what else do you want?

This is where things start to get interesting. You need to survive. and you dont have to worry about your damage, you are good. But to survive get guardian angel or dead mans plate. I personally prefer dead means because (Look upper page).