What knightly order would that be?
Anyways, I´m in beginning of creating a Marienburger army as well. The original plan might be altered by the new book and its suckiness, but there is a great fanmade DOW-list to be found on http://dogsofwaronline.com/forum/index.php
. It might need some tinkering, but I think it will work well.
My vision is a optimistic and progressive citystate army, as contrast to the doom and grime of the Sigmarite Empire. More Leonardo da vinci- style technology than Steampunk and strange monsters.
I´m thinking Gamezone Halberdiers, Pistoliers and artillery, Artizan Pikemen and Greatswords, Pirazzos lost legion as Halberds/pike. These units will include some dwarfs, ogres and goblins for increased xenophilia. Perry infantry will serve as detachments and missile troops, and their knights as....well, knights.
Aventine Elephants (bought from Araby) might fill in for Demigriffons. Flying heroes will be given air balloons and stuff; scratchbuilt probably.
Do not expect pics in a while though, I´m a slow painter.