That was not my intention. I was just a it surprised that a non-Empusidae can tolerate each other so well - with a lot of food and some space they seem to do just fine.Your post here does sound like you categorized them the same level..... I have kept all those species you mentioned above and they are not on the same level of cannibalism (No mantis is communal!)As for T. graminis, cannibalism can occur through out all stages, not only when female mature into adult.