Looking up Abjurant Champion as a first, ran across an interesting little design flaw. As you all well know the AC can add her class level, as a bonus, to any abjurant spell that offers a bonus to ac. The class shows mage armor, and later quotes same, but mage armor is not an abjuration. Shield and Luminous armor are, and are by far the 2 favs to pick...on prob is AbJ Champ was out some yrs prior to Luminous Armor, found in the BoED. So at the time of release Abj Champ could only used the shield spell?
sidebar question - magic circle vs evil fulfills criteria by being both abjuration and a bonus to AC, would the Ab Champs additional bonuses apply?
Blightersbane