Hello everyone! I've been a League of Legends player since 2012. I used to main support, but ever since I had a group of friends to queue with, that changed. I would always be forced to play Jungle, since that is what no one else wanted. After awhile, I started playing other champions in the jungle, like Jinx, Kalista, Lissandra, and Karma. Ever since the changes to Karma, she has great sustain. So I wouldn't say Karma jungle is a bad thing. Just some practice is all it takes.

Also sorry if this guide looks like complete garbage, this is my very first guide.

Pros:

-Has great sustain ever since the changes to her W
-Has good burst and can survive with shield and root
-Good ganks with her CC
-Late game power
-Excellent AoE damage and shield (New Masteries give you a 8% buff to your shields and heals on yourself!)
-Has a skin based off the white lotus from the Avatar series! :D

Cons:

-People will most likely flame at you
-Late game power can be reduced if enemies are always in your jungle
-Squishy
-Mana hungry
-Not the greatest at killing Dragon

Quint of Hybrid Penetration I use these Quints on Karma since Mantra's cooldown is reduced when you auto attack or use a spell against an enemy champion. They will help you dish out damage and get a quick and clean kill.
Mark of Hybrid Penetration Just a bit extra penetration. :P
Mark of Attack Speed These will give you 10% Attack Speed. They help by speeding up your damage and clearing the jungle. It'll also help you get more use out of your mantra, and you will land more auto attacks.
Glyph of Ability Power These will give power to your abilities for early game. If you feel like switching to Magic Resist glyph's, feel free to do so. You can also split them up by doing Scaling AP Glyph's and Scaling MR Glyph's.

Inner Flame You should always max this ability first since it is Karma's main damaging ability.
Focused Resolve With the recent changes to Karma allowing her to use this ability on Monsters, I max it second. It will help deal damage to the monsters and will root them for a short amount of time, and you'll move to the next camp with more health. Use this with Mantra to heal off of Scuttle crab since he does no damage to you.
Inspire I used to max this ability second, but now I max it last. You can max it second if you want to for a better speed buff and more survivability, or to help a teammate survive.