[@Savato] I would say Asmodeus would rival the power of the Chaos Gods, though he would kind of be their antithesis. As for the Archdevils, assuming a Pit Fiend can rival or beat a Bloodthirster in single combat and an Infernal Duke is significantly more powerful than that, A single Archdevil could rival the Emperor in sheer power, capable of terra forming mass amounts of land in their operating circle.