Magic seems to work the same. Lone wolf with +10 Warfare doubles Necromancer damage as well. Which actually results in Necromancer being BY FAR the highest possible damage sources in the game, due to 1) no physical resists, and 2) great base damage which scales with both int and warfare. That such damage can eventually heal for double the damage dealt and you can be completely immune to death while dealing double your already high base damage to enemies with abilities also in the Necromancer tree just further swings things out of proportion.