Wisdom,Charisma, and the Blackguard

[bolo]

Ok, I saw good info in the other blackguard thread about how your bonuses from charisma are added to saving throws, but I could swear I read somewhere else that wisdom helps us too, something to the effect that wisdom bonuses help with the DC of our spells ( well actually our spell like abilities).
Just wondered if wisdom helps in any other ways, such as spell duration for things like Bulls Strength, or our summons ( won't really help my guy too much, his wisdom is only 9 or 10)..

I know Cha helps with turn undead, smite good, and also benefits the ( kickass!) taunt skill, as well as the divine feats ( might and shield).

I'm undecided as to where to put my last 2 attribute points, wether they should go to strength or charisma, or con. I'm thinking charisma, since those bonuses and a high charisma help a blackguard in so many ways.

Of course, at the rate I level, I won't have to worry about this till the end of next summer