Improved Spread Shot
From Guild Wars 2 Wiki
Fire a spread of bolts through foes. Does double damage to siege weapons.
— In-game description [?]
- Unlike other ballista skills, this one uses cone AoE ground-targeting instead of point blank on target.
- This skill replaces Spread Shot for players with at least 2 ranks in Ballista Mastery.
- This skill is replaced by other versions for players with ranks in Ballista Mastery.
- Greater Spread Shot (requires rank 4)