The fighters do quite alot of damage but are a bad choice since there more like a DOT and have 1.5-2km range.
That been said Fighters alone can take out a Nox arty cruiser with out any help in around 15 seconds not great but there going to keep attacking even if you are scrambled.
There more or less never going to attack Vetts since by the time there going in on an attack run the Vett is dead or out of range. That makes them a poor counter to a ship you would expect them to be a good counter for.
Over all i think there damage per attack run needs to be higher to make them worth using as there just doing the damage to slow to make them worth taking over all other mods in that slot.