Botherer halts mid-air when it is approximately 43 PU away from an enemy tank and rapidly fires 30 projectiles. Each projectile deals 5 damage at normal range, but only 1 damage at a very close range.
Tormentor is similar to the Botherer but fires 40 projectiles in rapid succession. Each projectile deals 4 damage at normal range, but only 1 damage at a very close range.
Punisher is also similar to the Botherer but fires 60 projectiles in rapid succession. Each projectile deals 3 damage at normal range, but only 1 damage at a very close range.
You can deal large amounts of damage with the botherer by moving close to the enemy, and shooting below them (into the ground) at full power. Only works if your enemy is higher than you. Video example appended.
If you must shoot Botherer and its upgrades at a range it is best landed if your opponent is near a bumper or if the angle it targets the enemy tank at gives a possibility of hitting enemy tanks behind your opponent.
If the arc of this weapon passes too close to an enemy, it will lock on to them which can ruin its potential damage.