I actually have that same weapon with double pierce, and frost shot procs with each pierce. But you have to line it up so that it'll hit two enemies, because once it hits one it'll branch off and hit ten more + a brand new frost arrow will go in place behind it, if that one hits another target it'll do the exact same thing.
Not the best at explaining things like this, hope that helps?
Now my question is how well does this weapon work and with what skills?
Of course Hungering Arrow is great, but I am more interested in the mechanics of frost arrow.
I can see it pierce the first target however I haven't seen it "explode" twice.
Any information is helpfull
Also I doesn't seem to work with Hungering Arrow Shatter shot!?
Not the best at explaining things like this, hope that helps?