I currently have it bound to just flame shock but I'm going to put it on my other spells too.

Wind sheer is off of the global cool down and it looks like its casted at the same time (ie I'll see the flame shock animation on one target and the wind sheer annimation on another at the same time) -- all though I did to spam my buttons to get them to go off to account for changes in range, melee weaving in and out, ect.