Question about jaw fish

[Rikko]

Sorry to hijack the thread, but can anyone tell me what their compatibility with gobies, blennies, dragonets, etc are like?
I've got a bicolor blenny, yellow watchman goby w/ pistol buddy, firefish and one day when I have enough faith in my fuge I'd like to add a mandarin as well. I'd read the usual spiel in books and online about their jumping habits and sensitivity, but strangely I've never seen much mention about their compatibility with other fish.