This article describes the Ranger build. For info on Ranger lore, see here.
The Ranger is a Paladin build, using Bows or Crossbows as a weapon (mostly crossbows). This build uses its Aura to increase damage. Depending on the weapon (and its mods) you use, you might settle for Fanaticism or Conviction.
A popular weapon for this build is the Buriza-Do Kyanon, a unique crossbow with mods, primarily used to slow your enemies down.
Though this build has a lot of style, it's hard to play: You won't have a special attack on the left-click button and Paladins don't have any skills (apart from the Aura) that support ranged weapons (no multiple shots, no guided shots, no further bonuses...). Because of this, the Ranger could been seen as the successor of the Rogue class from the original game.