James McMurray
First Post
The only advantage that the spellsword has is that he can wear armor and cast spells. This can be quite nice, but with magic items that provide almost the same AC bonus without limiting movement or physical skills, it isn't overwhelmingly powerful.
To say that casting spells in armor is not useful is to ignore the ability of teamwork in a group. With Mithril Full Plate and a Shield you can have your cleric buddy cast Magic Vestments on you and get (assuming we use the 20th level examples that people keep spouting out) you can cast spells with 0% arcane spell failure and have an AC a full 16 points higher than the wizard who has to use only Mage Armor. Then, tack special abilities onto your armor, and watch the other guy start to falter even farther behind in being a good Fighter / Wizard. I think that +20 falls into the category of "overwhelmingly powerful" when compared to +4.

And of course, except for Bracers of Armor (whih our Spellsword doesn't need), all of the items you talk about will stack with the armor worn.