Mounted archers are probably some of the most deadly units around, perhaps cataphacts are worse, but then there are mounted cataphract archers....
So I recently had the pleasure of dealing with a massive stack of horse archers. On Very Hard battles. Forget Rome that died long ago, the Sarmatians are the real final boss of this campaign.
After this painful and grueling battle... tens of thousands of sharp arrows later, I wondered how most people would deal with something like this. Indeed the descriptions of some of these units are quite frightening.
Do you use a lot of archers? (How well do they deal with the heavily armored ones?) Perhaps some people rely on masses of the same, but with everyone armored (wouldn't work on Very Hard though)
Spoiler for Final Result: