yellow belly blue damsel

I currently have a 29g biocube thats been up and running for abouut 3 months now. I have: 2 Ocellaris clowns 1 diamond watchman goby 1 yellow bellied blue damsel. Im currently thinking abiut getting: 2 cleaner shimp 1 flame angel A few corals I have read that flame angels can nip at corals and...