Hello,
This champ is for patiently peaple. Be patientlyand dont be impetuous and you will be OP.

- you can have on 18th lvl dmg 430-500 (crit 750+)
- HP 3000+
- movement 420+
- so many oponents are easy kill, but dont forgot low CDs on W this skill is good on "run" or "hunt"
- dont forgot Zed is "energy" assassin

+ hifh dmg
+ nice bonus on dmg
+ easy jump and run
+ your enery have got high refill

- high cost of spell
- paper
-big cd on W

- you can use W + E + Q - very nice ... they cant target you and take some HP you can take theirs HP without scare :) (ranged)

- W + E + Q you can jump to the enemy and give him very big dmg and when he start run you do Q (last)and finish him (meele)

Zed neednt Phantom Dancer but its good choice, you can try replace Phantom Dancer by Guard Angel or Youmuu's Ghostblade.

More interstin runes can be on amor penetration.

Someone maybe want give more points to the deff build but i think this is bad idea.

- Dont go first in team fight its kamikaze. Wait on someone of team. The best choice is wait on tank and give him little time, enemy must focus him, no you.

- Be carful when you want be solo because when they are 2 or more they can kill you easy.

Flash - help you to the attack or to run. Good choice when you want be OP.
Ignite - Good fuse.

W - give you shadow clon and nice passive add dmg.
Basic passive add 8% dmg when enemy have got half HP.

Do only last hit. With his basic Passive is very (+8% dmg).

Zed is good champ. But he is not easy when you want be good but he is funny try him and HF and GL.