I'm new to using the GECK, but I'm working on a mod that adds a few dangerous individuals to the Mojave wasteland, including, but not limited to: A pyromaniac with a very dangerous flamer living in a much more dangerous H&H Tools Factory. A tough-as-nails, crazed Centurion. Two riot shotgun wielding mercs, one with magnum buckshot and the other with slugs. A gal sporting a laser weapon that sets you on fire something awful. All of these enemies will be statted appropriately so they have high ranks in their chosen forms of killing. Provided you're not using an overpowered weapon like the sniper rifles, they should end up being pretty tough to kill.