When i tryed Zed i very like him i love his game play with his shadow and the trick you can do with it. I tryed Zed jungle but i don't like him in jungle because he dont have enough croud control for make very viable gank. So i decide to play him top or mid depending of team mate he can easily play agains mage because of his range harras and the fact that he add no mana help him to make pressure on the mage by throwing shuriken and insisting on the enemy to waste theyre mana. Zed can easily top agains ad offtank or tank because of the same aspect as the mid he can harras from range and when the enemy drop below 50% he go spam passive on him each 10 sec.

Zed have enough ad like that because of the passive of his W so i take the armor and magic resist for be able to go top or bot depending of the enemy and the allies team comp. I still take ad rune for do some damage on enemy.

I am always maxing the shuriken(q) with Zed because it is his main harass spell and it can deal significant damage to enemy before angagin a 1v1 or a team fight. For the second spell i am maxing i take the shadow slash because it his reducing cooldown on shadow living, it farm very well because of the AoE effect and the last reason for max second this spell it's for counter champ that jump on you as Xin Zhao, Lee Sin or Wukong it deal more damage than they do to you and you dont have to aim it and for the champ that go invisible as twich if you are chasin one that have no more hp you just spam this and you have chance to kill him.