You have magic missile, why? You already have Ray of Frost, Charged blast gives you nothing.
I would think Frost Nova would be pretty good in your build, because your Ice-Centric and Frost nova can freeze mobs in Blizzard, not to mention being pretty good defensively.
I'm not really a fan of the "familiar" - it actually seems a rather poor skill, with the possible exception of Sparkflint.
To sum it up, drop Missile for Electrocute (Better AE damage) (which will go well with Blizzard; possibly pick up more defensive options, cause you'll be unable to solo in inferno.
Other than the archon, which has a fairly long cool-down, you don't really have any way to escape an "oh shit" moment on later difficulties. No teleport to quickly get out of a problem spot, no energy armor to buff you defense, no diamond skin to absorb damage, etc. I'm not sure I would count on a super-long-cooldown spell and slow time, which doesn't have a huge area of effect.
Maybe switch familiar with something more defensive? Or wait and see how the later difficulties are going, and switch then if necessary.
You have magic missile, why? You already have Ray of Frost, Charged blast gives you nothing.
I would think Frost Nova would be pretty good in your build, because your Ice-Centric and Frost nova can freeze mobs in Blizzard, not to mention being pretty good defensively.
I'm not really a fan of the "familiar" - it actually seems a rather poor skill, with the possible exception of Sparkflint.
To sum it up, drop Missile for Electrocute (Better AE damage) (which will go well with Blizzard; possibly pick up more defensive options, cause you'll be unable to solo in inferno.
Maybe switch familiar with something more defensive? Or wait and see how the later difficulties are going, and switch then if necessary.
It's really not. Magic Missile and no defensive options? Not what I call solid. It's an "I want to spend most of my time dead." build to me.