Oh one other tip, It's probably better to increase constitution as opposed to using the raw vitality column. That seems to be mostly used for bosses.
Do you have the "Creating Combat" document? Larian put it out awhile ago and while it has some erroneous information from the old game I think it's still the best explanation for how most of the stats work.
I think the link is dead though so if you want I can put up a copy of it.