Attempting to Change a unit for the newest version of FROME.

I'm making Dragon Slayer recruitable by both Erebor and Belegost. (done; easy).
Removing Shield Wall and adding in ability to trow 2 throwing axes. This seems to me to be more realistic for "dragon Slayers"; and makes them a bit more like Roman Legionaries than anything else.

What files must I change besides export_descr_unit?