The evolution of your character is finished as you click create at the end of the character-creation. The rest is just the equip you got access to. With a shield you can may be able to take more hit(s) but with more base dam you might you can heal up yourself and your group better or help with focusing adds away. Same goes for statpoints. Untill you reach the very lategame you have no choices that matter much. And even there most characters of one class are clones.