From WoWWiki

Arathi Basin set refers to a three piece rare and epic quality honor reward class set.

Set	Alliance	Horde
Druid	The Highlander's Purpose The Highlander's Will	The Defiler's Purpose The Defiler's Will
Hunter	The Highlander's Determination	The Defiler's Determination The Defiler's Fortitude
Mage	The Highlander's Intent	The Defiler's Intent
Paladin	The Highlander's Resolution The Highlander's Resolve	-
Priest	The Highlander's Intent	The Defiler's Intent
Rogue	The Highlander's Purpose	The Defiler's Purpose
Shaman	-	The Defiler's Determination The Defiler's Fortitude
Warlock	The Highlander's Intent	The Defiler's Intent
Warrior	The Highlander's Resolution	The Defiler's Resolution

Level 58-60 Set Item Costs
Item	Level	BoP	Cost
[Shoulders]	60	X	12375/ and 40
[Waist]	58	X	4125/ and 20
[Boots]	58	X	4125/ and 20
Total Cost	20625/ and 80

See Also: PvP-Epic, PvP-Rare

Armor sets
Class sets		Death Knight sets • Druid sets • Hunter sets • Mage sets • Paladin sets • Priest sets • Rogue sets • Shaman sets • Warlock sets • Warrior sets
Dungeon		Dungeon Set 1 • Dungeon Set 2 • Dungeon Set 3
Reputation		ZG: Zandalar Tribe set • AQ20: Cenarion Circle set • AQ40: Brood of Nozdormu sets • Sunwell: Sunwell sets
Tier (Raid)		Tier 1 • Tier 2 • Tier 3 • Tier 4 • Tier 5 • Tier 6
PvP-		Arathi Basin set • PvP-Rare • PvP-Epic • Veteran's • Vindicator's • Guardian's
Arena		Season 1 Arena rewards • Season 2 Arena rewards • Season 3 Arena rewards • Season 4 Arena rewards