pterois volitan

So I got a volitan lionfish 3 weeks ago. It's diet includes live mollies and some dead food. It's a active fish but I have seen it itching using its fins. My guesses are that bristleworms are disturbing them but still wanna confim. Blue velvet demsel is it's tankmate(full sized)

I have read so much mixed info online, some people say it worked for them with their volitan, others say theirs ate the wrasse. So as I understand it, it’s 50/50. Our lionfish lives in our ‘live’ rock tank, so obviously if disease happens in that tank from cross contamination or something, we...