User blog comment:B214/Shin DxD 1 discussion/@comment-32252462-20181120214906/@comment-31137559-20181121194444

Rudiger is allied with Dulio's team for the Azazel Cup not Heaven itself. They had the same wish in mind and because of what Dulio did for Rudiger's son before he died, he decided to become a supervisor for Dulio and his team using his vast Rating Game experience and his tactical and strategic knowledge to help Dulio win the Azazel Cup.

Mathers is a famous magician who even members of the Church were taught about. He just has a famous reputation as a very skilled and powerful magician.

I don't see how you made that comparison.