Zubie mean you Cannot cast speels of opposition schools from scrolls, the wands thing is new to me.
Yes, Conjurers are generally believed to be the most powerful specialised mage, but they cannot dispell invisibilty, which can be a problem with enemy mages and assassins, as they will not be able to be targeted with spells.
Of course you can always leave that to your Cleric or Inquisitor.
(Could this be why Edwin and Keldorn are made to be antagonistic? Because they complement each other so well? Hmmm...)
Fool me once, shame on you. Fool me twice, WATCH IT! I'm HUGE!!