I think giving bonus ability points from intelligence stat discourages playing any class other than wizard. Truly, you only need to raise intelligence with that class to be a good spellcaster and you have way more ability points than other classes to spend on other things, like social or general survivalist abilities. Rangers and warriors, on the other hand, need to raise more than one stat to be effective and they barely have enough points to specialize in their own tree. This all seems very unbalanced. I think bonus points from intelligence are in need of removal.
Also, I think AI should be programmed to attack wizards on higher priority to encourage players to spend points on raising HP and speed for running away.