The .jkb files are for bots, which are different from NPCs. Bots are problematic as well; as far as I know, there's no way to set saber styles (or specific sabers) for them. Plus, a lot of custom maps don't have pathing and they wind up jumping around the entire time. In SP, you can handle all of this in the .npc files and they respect their programming, but the same NPCs spawned in MP seem to disobey certain settings. They're all lightning-fast when it comes to sabering, which no amount of tweaking things like reaction, run or yaw speeds, etc. seems to have any effect on. No matter what class I've tried setting them at, they default to the fast saberstyle.