Hi

If I put extra enemies in levels where there are already some enemies, will they turn hostile to each other?

Another question-

Today I tried putting
braccus rex
near the first corpse you encounter(the one which initiates watcher statues quest), then I also placed a skeleton archer which kind of looked like a sand skeleton archer(the ones you face outside evelyn's hideout) near him(I don't exactly remember what skeleton variant I put in the map). I saved the mod and l loaded the game(NG+). There was a problem and the game didn't autosave. There were no monsters anywhere(the map was fully empty).

Then again I tried a NG+, this time the game started fine, and there were all enemies in the map again. But the sand skeleton archer was turned into a loot-able skeleton corpse.
Braccus
was there and he started attacking my party, but what happened to the skeleton?