What pretty much ended MD was when the recruit said MD's secret name and poked him. He may not be the most martially capable of them all, but he still is capable of fighting, in addition to being the most resourceful, cleaver, and intelligent of all the other heroes. And like I said earlier, this guy was behind major enemy territory, with no time for warm soft beds, and a recruit to the Battlemages. He really needed to play the politics and used quick wit and smarts to acquire powerful items.
Also, seti18, the staff of Sheogorath is a weapon of Sheogorath's direct essence so that pretty much cancels out the whole artifact weapon deal with the recruit.
So, overall, some Daedric Princes are more powerful than others? I thought they were all equally powerful, but in different ways.
The princes are powerful, yes indeed, but Mehrunes is destruction. You also have to remember that Mehrunes used more than his own troops, for he took Nocturnal's seducers and some of Hircine's minions for a Wild Hunt in the pocket realm. But, both the recruit and the CoC fought a prince 1v1, and the recruit did beat out the better 1v1 fighter. Also, I dare you to try and defeat Mehrunes Dagon when he busts out into the streets of the Imperial City. Yeah, the recruit had to fight him in a pocket realm, away from Mundus's nice and cozy barriers, deep inside enemy territory, right to the big man himself.