Welcome to the forums! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
I haven't played as a Wizard, only a Warrior, but I would suggest:
Strength: Enough to wear your favourite armour.
Agility: Even if you can stay out of melee combat, you will still have archers and mages to contend with. If missiles are bothering you, pump some more points into Agility, otherwise don't worry about it.
Constitution: Don't worry too much about it. There are an abundance of potions. You may want more stamina though. Later in the game you may want more hit-points for convinience.
Intelligence: A lot! Also, use Restoration Potions instead of Mana Potions. Mana Potions give you an amount of mana, Restoration Potions give you 100% mana (Small ones give 50%).
Hope this helps! (Hope I have a clue about Wizards! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> )
