I found an archmage class on NWVault that suites my needs well. I'm posting the link below for anyone who reads this topic looking for the same thing as me. I haven't extensively tested it yet myself, but the reviews seem mostly favorable. Thanks to all of you for your quick responses. =D
http://nwvault.ign.com/View.php?view=Hakpaks.Detail&id=283 @Jaysyn: All my information is secondhand, so I wouldn't know. Among other criticisms, I've heard that while the older classes, etc. are very solid, the newer ones are not so reliable. I remember one comment in particular advising users to only pick classes that have existed in the PRC for two or more versions. Besides that, I've also heard comments about certain aspects of the mod being overpowered and some races blatantly not belonging to the campaign setting like Baaz draconians.
However, the more I think about it, the more I realize none of what I heard is what really motivates me. Perhaps Morrowind spoiled me, but I believe the purpose of mods is to let the player make the game the way they want it, not someone else. It's the player's game, so they should be given maximum control over what goes on in it. No matter how well intentioned the PRC is, I'd rather pick my own mods than have so many unwanted ones forced upon me, and for that reason I think it's a real shame that so many mods are now only available through the PRC.
That's not to say that the work of the PRC isn't valuable, though. The way they made such widely differing mods compatible with each other is truly a great thing for the NWN community. The amount of work they put into their mod is amazing, and I admire them for it. I just don't want anything to do with it, that's all.