[PvK]

For Ulm, the Black Knights, Black Lords, and Smiths are some expensive units. The Templars and Black Priests of Iron Faith are cheaper to keep since they are holy. If you have many Black Knights, group them up and use them.

Ulm usually can have a strong and cheap army if it builds many of the gold-cheap but very well equipped heavy infantry. They're resource-expensive, but there's no resource maintenance.

PvK