Well one thing to keep in mind is that you have to choose a weapon and STICK to it. For example I chose the Axe so my acquisition of stats and skills is based on that. Once you hit higher levels the skills are going to become really expensive so you need to get only those that are relevant to your weapon of choice.
In order to actaully help you out with this question you have to give us an idea of what style of gameplay you like. If you want to be AOE the axe tree is best. Fist is a little mediocre from what i have heard, lance is good for range and frontal aoe attacks and sword tree is mainly for 1 on 1 combat so good for duels. as far as stat points that also depends on weapon choice