While I normally agree with you about 98% of the time kmonster. I do disagree that:
Wis is a dump stat in IWD2. As drow you have spell resistance which keeps eliminates almost all saves but even without SR and racial bonus to will saves you can dump it.
For something different, I just finished taking a power gaming set of builds through the normal mode of IWD 2 and have just begun HOF mode. I built the Drow spellsword exactly as described in the sticky.
I lost count of how many times the enemy beat my Spellswords spell resistence on the whole and specifically the racial benefit on will saves. I would guess that my Drow was taken out of the fight at least 8-10 times by hold person, emotion fear, cloak of fear, domination, mind blast, etc. etc. leaving the rest of group to clean up the mess. Granted he wouldn't have gotten attacked when dominated but any of the other cases would definitely have meant game over if soloing as Stworca mentions. It happened so often I even considered wasting a feat on Iron Will early in the game (but didn't) which is the feat I think you alluded to.
While the SR worked most of the time, it was overcome much more easily than I would have suspected. If you have a party where some have a good will save and can cast remove paralysis or dispel magic it is fine for one/some of the characters to dump wisdom.
We each have our own method and preferences. I may be missing something but it sure seems like Will saves are called upon too often to have a PC vulnerable in that when soloing in my humble opinion.
