Her passive doesn't work on Jungle Monsters. Early game, this means that she only gets to use Mantra every 3rd camp or so, which is painful because both her clear speed (Mantra Q) and a chunk of her sustain (Mantra W) come from Mantra'd spells. If her passive lowered cooldowns on Jungle Monsters (maybe just Large Monsters?) so she could use it often, she might have potential.
But then they would have to consider how it would affect mid Karma. I mean, you can already duck in the the jungle and heal off Raptors already.
Idea denied
Sincerely, Jungle Main
Well, except for one more thing: Magus is gone.
Solwolf ran her as an on-hit jungler recently, so it's already possible if not great. I don't know enough about her to say whether this buff would be a good idea or not.
The thing is Karma is already a REALLY strong mid laner and to be honest, I'm quite surprised she isn't seen played Mid more often. She has a strong early, mid, and late game and she just simply becomes godlike at full build. She has very high damage and the first time I ever played her mid I ended the game with one shotting a Shaco and Leblanc and this could just buff Karma Mid even more, which does not need to happen.
I can just imagine Karma players stealing Raptors and getting their Mantra back up to spam it in lane more, maybe make it to where only large/epic monsters lower the cooldown if she has smite and machete or something, because I'd like to keep the sleeper OP Karma mid just that. The last thing she needs is to be able to spam her Mantra even more in lane.
As for Karma in the Jungle, I played it and I think letting her cooldowns get lower on the monsters would make her a pretty good jungler. Good, safe ganks, reliable CC, good clears as long as she has her Mantra every other camp or something.
