Hmm, well this has been done before, but since it is your first time, then it is ok. Remember these are only suggestions, not a knockdown, and if they have been mentioned before, then disregard them.
1. If you are going to use a 35% FCR spirit, i would suggest you change your nagels to 2x 10% FCR Rings with good mods and some mf to retain the mf%
Reason: this will ensure that you reach the 125% FCR breakpoint for you when using Glacial Spike for hoards and using Static on Bosses (or immune cold hoards).
2. I personally like Isted armor, wpn and helm for this type of build if being mf, or I will add Strength items into them so that I have more points into Vita.
3. Single (just about pure) casters can be limited to a few areas in Hell, so I tend to have hybrid builds more than anything.