This my guide for Zed. I didnt saw any other guide for jungle Zed and i thought i could help you out a little bit.
The very task on zed is to take out the enemies adc or any fed player in a very short time, right before the team engages the fight.

Some little information to the runes and masteries are written down in the notes area at the runes above.

For items i think the build order like machete -> boots -> brutalizer -> bloodthurster -> black cleaver is standard, after that you have to react on the others team.

For spells i like smite (for jungling) and exhaust; with exhaust you can chase your enemies much better and finish them of with shadow slash or razor shuriken. Also you can use flash to do that.

Pros:

You will deal a crazy lot of damage over little time, in favour with your ulti
With Living Shadow you are very flexible where you want to move

Cons:

You got very low health, so you gonna die fast
Your ulti just deals big damage if you fight your enemy while casting it

Some tricks:

The very most important trick is to use living shadow right after your ulti to get 2 extra shadows. Then use shadow slash and razor shuriken. At least the ult will finish most enemies off.
Another trick is to cast living shadows over a wall to see what is behind and cast razor shuriken to harass enemies (maybe) in tower-range.
The most effectiv way to gank is, to run in and cast living shadow right behind your opponent. Then you will instant use shadow slash to slow the enemy. After that you can use a summoner spell to finish him or just auto-attack/razor blade the enemy.

In the end i would like to mention that i love zed, and i think it's not easy to play him, but if you are able to, it should be possible to take out the adc/ap mid before the fight to get an easy fight with the team.