"Missle count * Damage Amount"
If the damage does not hit the "Max Damage" the damage repeats until reaching it.
If the Damage cannot be executed until the "Effect Duration" ends, it will bug, dealing no damage.
Basically, the spell deals 4 intervals of damage, each with a cooldown of .25 seconds for 1 second, checking if the damage hit the maximum (105/195/300) by default. When the maximum damage is reached, it stops dealing damage.