Yea, to be accurate. If I'm on my shaman, I just put it at my feet, and I've got a decent size AoE (because usually I'm getting beat on, no retard's gonna stand and watch me earthquake from afar).

I've started to get good at it with my mages, I just try to keep them near each other and facing the same direction, click the button, get a general glimpse of where all the target circles are and place accordingly. More often than not, the mobs catch at least 3 - 5 blizzards. Also, if my slaves are a little behind me, that means the path the mobs are going to take towards me just leads to more blizzards, so it's kind of a win-win, so to speak.