Unless you're using a spear skill, I don't think it's possible for an amazon to match the killing speed of a sorc on a single creature.
EDIT : Response to original post. The problem here is that 20 is not the maximum : " The remaining five skill points can then be gained with +skills items" . If 20 were the max, then this would be true, but skills can go as high as 40 (or is it 50?).
EDIT : Response to original post. The problem here is that 20 is not the maximum : " The remaining five skill points can then be gained with +skills items" . If 20 were the max, then this would be true, but skills can go as high as 40 (or is it 50?).