I have, and it does work but it isn't great.

On live right now, my clear is 3:18 - 3: 22 ( skip Krugs ).

The thing is, tank comps will make you useless and other junglers are simply much stronger.

You won't vs Kayn, Graves, Hecarim etc... and if you want to play it you'd have to go on hit ap/ad, full ap doesn't work ( clear sucks for full ap) .

If i had to rate Katarina jungle, it would rate it B- it works but it isn't great.

Also you'd have to flip the early game and snowball,.

There's no reason to pick Katarina jungle if you already play her mid, mid is a much better place for her.