all I know is hammers and frogspawn can touch but torches will sting them so need to be kept away. not sure about the others though
I used to have my torches on the same rack with the other euphyllia and they were fine. One day added a mini torch to it and the torches stung it. From then on I couldn't let the torches touch the hammers or the frogs cuz they get stung. I wonder if those minis torches (if that's even what they called) are different type of euphyllia seeing as how the torches reacted to it.
Euphyllia cristata is a smaller version of glabrescens. No idea if it is more aggressive however.