[PvK]

Ice Drakes can be good if you have other cold-immune troops, and place them appropriately.

Infantry of Ulm is no good in small numbers, but it gets strong when one has the patience to mass enough of them in line (at least, against foes who don't have something that ignores their armor). Cheap in gold for the protection, but sadly for Ulm in MP, there are many things that ignore armor and tend to be easier to amass than a lot of high-resource infantry, especially by mid/late game.