| Jeraa |
Mage Armor is Conjuration because that is what it has always been, at least since AD&D.
And I was going to say "Shield is abjuration, because it has always been abjuration" but that isn't true. For some reason, Shield used to be Evocation (at least it was in 2nd edition).
As to why they are in separate schools, despite both doing a very similar thing (creating an energy field to protect you), who knows? Maybe they separated them so that a specialist wizard was more likely to have at least one on his spell list. (In 2nd edition, an invoker had shield, but not mage armor. A conjurer had mage armor, but not shield.)
| Sylvanite |
Yeah, they just weren't paying attention when they wrote that class up. It's still unbelievably good even if its bonuses only apply to shield instead of both shield AND mage armor. There are some other deflection spells in 3.5 (maybe even in that book, though Abjurant Champion is in Complete Mage not Complete Champion).
If you really want to go full cheese, the spell Greater Luminous Armor is in the Book of Enlightened Deeds in 3.5 and is a more rockin' version of mage armor that falls under Abjuration. Though...you do glow like the sun for the whole day (enemies get a -4 to attack you tho!).