I think there are two builds right now...
1. is the grind build (for me, I like having freehand sorc. and the ability for that extra damage). I really don't feel I'm losing all that much with an empty 2nd slot. My int is still capped at lvl 65, and my power pool is usually the highest in the group, even with other casters 2-3 levels higher then me.
2. the raid build
On the #2, the more I think about it, I really like the post in this thread talking about the Int line wizard with the hate reduction. That may be the preferred line to go for the raid wizard....I'm liking it more and more....