Hi,
I keep my hissers and dubia's together in a two foot bare glass tank, heat mat under one end, water and food at the other, temp 26 to 31 c, humidity 20%, no misting, and my colony is doing fine, no cannibalisation that I have noticed and they get along fine. I was told so long as you don't keep winged and wing eaters together they will adapt and breed.
hope this helps those with limited space or cash. X