Enemy sovereigns and champions (except the first few) has multiple classes. This obviously makes them especially useless (with the possible exception of warrior/assassin). most are Mage/Defenders.
Also, the sovereigns seem to be repeatedly buying horses and wargs, but not equipping them. Every surrendering sovereign has like 20 of each in their inventory.
Magnar: Mage/Defender
Vega: Warrior/Assassin
Ceresa: Mage/Defender
Relias: Mage/Defender