Zed does not win extended fights. He wins through short burst cycles and repositioning. The build maximizes lethality and execution frequency while reducing risk.
Long Sword
Lethality + MS for roam and burst assassin R-combo
Burst + shield in trade, procs on W-E-Q-AA combo
Slow + penetration, colle à the target after R Death Mark
Gluttonous Greaves
Stasis
W Living Shadow and Q Razor Shuriken stack Conqueror in extended fights.
Scales AD to that his assassinations R Death Mark are even more lethal in late game.
Finishes marked targets with the R Death Mark before the explosion of the mark.
Attack speed to trigger his attacks shadow doubled more quickly.
Reduces incoming damage during his engages R when He trade his position.