A weapon with the Hail of Doom trait is described as:
Each shot with this weapon has a 5.0 - 15.0% chance to split into 2 projectiles.
Does this proc with each of the Beam Staff's different attack types? These are: primary (shotgun-like blast), secondary (beam attack), and the attack done when you press primary fire while holding secondary fire (high damage on beamed target).
I'm especially curious if it procs with the beam attack and how does it proc. (Two beams or two 'ticks' instead of one?)