I was browsing around to see if there may be any hint of future weapons/content and I saw that there are rider animations for sword and crossbow, sword and repeating crossbow, and also sword and shield and repeating crossbow. I didn't take a picture of that but it was in the animation tables files.
Dw I think is dual wield. 2h250 is halberds, 2h175 is everything else. 1h095 is all one handed weapons.
At present I am trying to determine how to assign a unit animations, as it's not in the land_units table like before. If I manage to make an ersatz mounted crossbow I'll post how. All I am doing there is just making it on the mounted archers so I don't have to fiddle around with making a new unit