Head: Gladiator’s Chain Helm or Storm Helm (Storm Helm is very hard to get, it can be crafted by blacksmiths from a very low drop recipe from Black Temple).
Shoulders: Gladiator’s Chain Spaulders or Mistshroud Shoulders (very hard to get).
Belt: Renegate Belt.
Hands: Gladiator’s Chain Gauntlets.
Legs: Gladiator’s Chain Leggings.
Boots: Renegate Boots.
Weapon: Black Bow of the Betrayer or use your imagination.
Or, you can use for your legs/boots/hands, items called “Renegate” (low chance world drop). You can hunt them in Auction House, they are very cheap.
You can check how this player looks, it has the Storm Helm, Mistshroud Shoulders and the renegate set.