Raaka made them for my mod BB, not for DLV, and designed them to roughly match the kinds of visuals seen in the Arn movies. He did also do some research on top of that and I think they're probably quite accurate (1180-1400 or so).
Consider permission for Dominion of the Sword to use these units to be granted already.
I'm sure Raaka would be happy to see them used in such a fine mod, so it's for DotS modders to decide