You may consider to set up some ranks of 300-400 densely packed Strelets' Romans. The view is very impressive, almost like a painting.

the dark age figures are excelents
idem the crusades and nevsky
most of the romans are nice(i like the auxilary)
i like all the ancients cavalry(dacian too)
dacian infantry and russian levy are not the best
but napoleonic cavalryare so good for me
so dark age is the winner

Unfortunately I think the Dismounted Mongols are another poorly sculpted set with short arms, skinny waists, flat, ballet-dancer running poses (when will plastic figure makers learn that people don't run sideways with feet raised at ridiculous angles??), ring-holes that pass through the torso and thick, clunky weapons. Plus moulded-on shields for which there is no evidence for light cavalry.

Sculpters, please acquaint yourselves with basic stuff like Eadweard Muybridge's photos of animals and humans in motion and Gray's Anatomy...