I have been thinking of ways to try to make the Vateshran bow useful, so I came up with this fun thematic build that performs decently in content like VMA.

Setup:

• Equip 5 Plague Slinger
• Equip 5 Pestilent Host
• Equip 2 Vateshran Bow (Point Blank Snipe)
• Style your character with disease-themed armor (especially the Velidreth style bow with it's pestilent cloud look)

Gameplay:

• Cast Beckoning Armor (the Necro armor skill that pulls ranged enemies in close)
• The pulled enemy gets hammered with poison balls from the skeever corpse of Plague Slinger
• You unleash a short-ranged Lethal Arrow (poison morph of Snipe) that always applies the poisoned status effect (important to proc Pestilent Host) and you also get that sweet 33% more damage on snipe from the Vateshran Bow
• The enemy dies while poisoned and Pestilent Host procs and travels to another enemy who is already near you or has been pulled in by your Beckoning Armor
• Rinse and Repeat

All three sets work well with the Necromancer skill Beckoning Armor because it pulls enemies in close where each set has a chance to shine. The build has a unique playstyle -- a combat archer -- and it looks awesome, especially with the Velidreth style bow among all of the poison/disease sounds and visuals, corpses, and fetcherflies.