Ah, but you can use the same thing for Freezing Trap, Tar Trap, Hi-Explosive Trap, Binding Shot, Flare, Volley, Wild Spirits, Resonating Arrow, Door of Shadows, basically any spell (not item or pet command) with a reticle.
I use it to make damn sure my Freezing Traps in particular go where I want them, everything else is AoE so close enough is close enough, but I have them in there as well just so the flow is the same for everything.