Yes.
I saved 34 stat points, checked my damage with 1 int and with 35 int and it was the exact same.
So I'm totally wrong and I can better spend my statpoints into other stats than boosting my Int. !?
Yes.
Unless ofcourse you care about the other stuff that Int provides, such as protection from magic damage and so on.
I would like to hear someone prove otherwise, but it seems the above holds true - int does not affect spell damage at all.
