Are there any mods that adds bosses? That isn't extended story that is.... Reason I say this is because those bosses are too tough. I know there's the archaic beasts,unobtainium power,supper's monsters and classic minibosses, but I'm referring to actual bosses, like the ones in the main story? I also already downloaded the boss improvements mod, before anyone suggests me that. Oh yeah is there a way to improve the AI of the Vault guardians, they just sit there and let me whack them, and if I'm not hitting them they attack, as I'm attacking them it looks as though they cancel an attack, that kind of kills the fun of the battle.
Frackin' Universe has about 5 bosses and adds some minibosses as well, but it does so much more it would be a joke to call it a boss mod. Pandora's Box adds one regular monster who is basically a boss. He will kick your butt if you aren't prepared.
