Cracrzy,
Long time no hear. I have a blue and a splash broody right now, but I keep stealing the eggs. Was the one who killed her chicks alone with them? The reason I ask is I had a jealous hen kill another hens chicks before. All I can tell you is give it a try. If you are not planning on raising a bunch of babies, that is the way to go with a broody. They have to be kept separate from the rest of the girls for a while which to me is a pain in the butt, hence the use of the bator unless they all run free and have places to hide.
Kurt