The description says, "Thanks to wealth and military education, they are elite warriors who know how to use the bow and the falx, the two most important weapons in Getic society."

Now, with the RTW engine, I don't believe it is possible to give this unit a falx. With M2TW, though, I believe that there is a dismount function (correct me if I'm mistaken in this). Would it be possible to give the Ktistai the arrow and lance when they are mounted, and then give them to option to dismount and wield a falx?

I cannot think of a more epic unit than this it if it were possible.