Schematic Location: Found in the Tomb right next to the Sand Crags camp in The Hissing Wastes. And that’s not even including the offense and utility slots, the Masterwork material, and the Rune and bow Grip that you can attach later. This bow has a base DPS of 172 if you use a Tier 4 crafting material like Dragon Bone.
For archer rogues, the best weapon is the Masterwork Spiked Longbow, crafted via schematic.