While trying out Thresh Jungle in Normal Games, many People came to ask me:
Is Thresh Jungle viable?
Many even flamed me at first.
But then i showed them that he IS viable.

With his Q, E and his Ultimate Thresh brings a huge amount of CC.
Together with a Champion that slows or even stuns, early Ganks are extremly easy.
Initate fights with your Q. Drag them towards your tower twice and then reactivate your Q to dash to the Enemy. If he continues to run, use E on max Range to pull him back. If he isnt dead yet, trigger your ultimate.

Your Lantern is tricky to use. I realised that many People dont know how it works.
I recommend to explain how you will use it to your team (before game starts ofc).
1 Way is: Your Teammate can dash into the tower for a kill. You drop the Lantern next to the tower but stay out of towerrange. If your Teammate finished his Job, he can click the Lantern and return to safety.
There are many other Ways to use it. Dragon/Baron steals etc.

Ask your Teammates to assist you with Wolfes and Blue Buff Golem.
Head towards Wraiths. Drag yourself over the Wall with your Q.

After you finished Wraiths immediatly go to the Wolf Camp again. They will respawn quickly.
Then Kill Red Buff Lizard and maybe Gank. If you dont see a good Spot, kill Wraiths and double Golems and go back. After the First Back you need to start ganking or counter jungling.

Always use your Flay on Jungle Creeps. You may set up a Lantern before you start attacking the Creeps.
I dont recommend initiating Creep Camps with Q. (Expect you dragyourself over a Wall)