I know that she has most recently been constrained to mid lane due to her high scaling AP ratios, but if you were to play her jungle, would AP or AD be best?

Which has better clears early and late and which one has more effective ganks?

I played her AP jungle in season 2. AD was tankier, but AP did better damage. And the jungle wasn't tough enough to really have to fear a squishier build. One of my favorite junglers last year and probably my most successful.

Haven't checked her out at all in the new jungle, though. She always had iffy early clears, though, so I can't speak on her current viability.