Ricordea and yumas seem to be safe.Most zoas are on the menu, although a few have been avoided so far. I dont have any palys really, but some of the larger zoas seem to be less enticing. Might give palys a try.
Haven't tried a torch, but mine did nip at a frogspawn, so I am not too confident in torch. Gorgonians are occasionally nipped, but dont seem too enticing so far. Leathers and mushrooms seem to be the most safe.
I love the fish, and decided when i got it i was going to work the corals around the emperor. Likely going to turn into a leather/mushroom dominated tank.