[In the Reef Fishes Vol.1, it says they are shy and should be housed with placid tankmates. I would not classify a yellow tang and a clown fish as placid. They would probably cause the sunburst undue stress.]
[Imo, anthias are very hard to keep especially Sunburst, I had several different species before, none lived more than 2 weeks, the common problem I saw is scales start poping up after few days in the tank, then after few more days they died.
Here is picture I took long ago, one of the most beautiful fish.