This answer is a little late, but here it is. I am a gnome wizard with religion Solusek Ro. I started apprehensive to the Coldain dwarves, KOS to giants and KOS to Claws of Veeshan (sometimes called the dragons). On a side note, I was dubious to Frostone dwarves also.
The Coldain and Frostone seem to like Brell as a religion most. I have heard rumors the giants like Rallos Zek. I don't know anything about the CoV. I was told Solusek Ro should not help or hurt me much here.
For the most part I don't think being wizard affected much.