Need gear advise for wizard :)

http://imgur.com/BsSVE < Gear > http://imgur.com/vgh7A <Stats>

Need advise on which part of my gear should i change, I'm looking to gear to critical build wiz as you can see some of my gear already had. Kind of a struggling abit in act 3. Thanks alot!

PS: If possible kindly advise on skill build too :x