Though PakScape, I went thru assets1.pk3/ext_data/npcs and changed the FP_SABERTHROW value of every lightsaber wielding NPC to 0 so they wouldn't perform that skill anymore.
I also went thru assets1.pk3/ext_data/sabers and, in dual_1.sab - dual_5.sab, changed the singleBladeStyle value to strong so that it would replace medium style when using a staff.
I extracted every file, changed them, replaced the old ones and saved all the changes in assets1.pk3. However, the changes are not reflected in game. Is there something more required?