I don't see a problem with what you're doing at all. I think that one coral that would be a nice addition is pulsing xenia. I housed some with a picasso and a large stars and stripes puffer without any problems before, and I had a friend who had a porcupine puffer in his tank.
For all the critics out there, how many times have you introduced a shrimp, a hermit crab or a centryopyge angel into your system? How many of you have had yellow tangs which can develop a taste for corals? Every single thing we add to our systems is a possible coral eater, with the exception of pure pred
ators like lionfish. Even corals that we add are potential predators. Galaxea coral are definitely not what I would consider a community coral, nor are carpet anemones. Even soft corals can be potential tank killers in that some secrete toxins. How many of you have sea cucumbers or sea apples that could die and kill off your tank?
I think it's ludicrous to say that someone shouldn't do it since there's not a single person out there who hasn't put something in their tank, and probably that doesn't currently have something in their tank, that poses a threat by predation or by toxicity to the rest of their tank inhabitants. I, for example, have 2 yellow tangs, a coral beauty, a flame angel, and multiple hermit crabs in my tank, all of whom at anytime could decide that a coral is a tasty snack. I also have numerous soft corals, and who is to say that one of them won't release toxins into my system?
By the way, Mike, if you still have any frags that are for sale, I'd still like to purchase some from you. Also, if you want to try some xenia in your predator tank, let me know, it's everywhere!