Beowulf is actually one of the better Math Skill users because of excalibur, and ct5 holy, and has the second highest MA out of any other knight sword user, except for Arc Knight Zalbag/Delita.

Excalibur
Aegis Shield
Grand Helmet
Robe of the Lords
Genji Glove or Magic Gauntlet

Magic Sword
Math Skill
Blade Grasp
Magic Attack Up is my pick, but anything else could work.
Teleport or Move +3

Anyone have a save where they would be able to test that out?