https://ibb.co/T89tGz1
My name is Elie, I started playing LoL in March 2020.
I cannot say I'm good player but i really love theory crafting, strategy and more than anything else : playing exotic champions in the jungle !
Some of the picks I like to play in the jungle are Shen, Kled, Nasus... and Tahm Kench !
I wanted to wrote this guide because so far, Tahm Kench is the best exotic jungler i ever played. I think he can make great things as a jungler at least at low elo.

I. Because it's exotic
In low elo, ennemy players won't respect you without knowing that you're real beast in early/mid game.

II. Strong early game
As I said Tahm Kench is extremely strong in early game, he's got the biggest armor stat at lvl 1 (47), his Z has %hp damage and you proke it super easily with Hail of Blades. You can 1v1 most of the junglers at lvl 3 or 4.

III. King of scuttles
You can easily secure scuttles by spitting them in your jungle to do them quietly. You can also steal a scuttle crab to your ennemy jungler by making the combo Q+W+smite.

IV. Deamon of ganks
You got the slow of your Q, the eating of you Z and your ultimate to make terrible flanking. I think that Tahm has one of the best gank potential.

V. Amazing Duelist
The fact is when you're good in your game, you can 1V1 almost any enemy laner.

VI. Clearing Jungle
No need Titanic Hydra, Tahm clear is really good

VII. Godlike ultimate
Tahm ult is so good ! You can gank, flank, save a teammate, backdoor... at lvl 16 the range is almost 3/4 of the map, so many potential ! However, be careful to use it properly, you can make bad move out of it. That's why i dont go for Ultimate Hunter, your ult need to be smart.

Tahm late game isn't the best althought you always gonna be usefull because you're tank.
Some allies won't trust your pick and gonna ruin the game because of that.
Maybe others things will come...

If you want to go for double scuttle or being aggressive on the ennemy jungler, start at the same buff than him. For example Kindred will always starts at her red so you start at your's.
If the ennemy jungler is too strong in early, start at the opposite.

You don't need a pull to easily doing a full clear.

The most efficient path is starting at your red. Auto-attack then Z him, spit him right away, Auto-attack until your next Z then Z him and split it on the raptors and smite him. Take your E and kite the raptors, they are burning with your talisman. Z the big one and auto-attack the small ones. Proke your E shield as often as possible expect if you're about to end the camp so you can hp regen. Go to wolves, AA, Z the big one, dont spit it while killing the small ones. Do your Blue and Gromp, you can be in the river at 3:15 for the scuttle.

You always want to Z the biggest monster because it does %hp damage.

Don't hesitate to gank you have a lot of chance to success or at least take a flash on every lanes.

Power farm when you have to, you're clearing camps fast.