Wisdom will give you one, maybe two extra levels by the end of the game. Actually, depending on your level, not putting skill points into it right away doesn't make a huge difference. Wisdom - is it worth the skill points?

I liked Stun with a sword for my warrior.
Survivor's Instinct was just about the thing I needed for healing in the wastelands (I maxed it when I got there to use up some skill points).
Spellshield comes in handy fighting anything that uses poison. The damage comes off the shield, and you do not jerk around with a lowered attack / defense ability.