I have jungles Zed multiple times and as I've noticed, he has one of the fastest clear times and can come out for a level 2-3 gank easily.
- Jungle Route
Top gank: Red, wraiths, wolves, blue
Bot Gank: Blue, wolves, wraiths, golems
Mid Gank: Red, wraiths
Generally you want to start with red, making bottom gank next to impossible to do at level 3, though it IS still possible.
Zed has great potential, and I plan to add more to this guide as I go along in my games with Zed.