Well, with the Signing of the Compact, the Angels had to withdraw support of their Dragons, so they were vastly weakened. Meshabber of Dis used to be a Demon King/Lord, Ruler of the Iron City of Dis on the Third Circle of Hell, so doubtlessly very powerful, while the Mithril Golem was built by dwarfs, and Blessed/Animated my Kilmorph. (as well as being a giant made out of Mithril, presumably more then twenty feat tall.)
P.S: I say the Meshabber used to be, because his old Civopedia entry used to say tht, but I don't know now.