Green Chromis & Yellowtail Damsels: Compatible????

I have a 55gal that currently has 5 green chromis and 1 yellow damsel. I also have a smaller hex setup that I am going to combine with my 55. The hex has 2 yellowtail blue damsels and I'm not sure if they will get along with the other fish in the 55. I have lots of little hiding places throughout my rock for them all to claim and hide. Any thoughts would be really appreciated.

 

At one time I had chromis and yellow tails in same tank, but I had put them all in at the same time, and were about the same size.The yellow tails began to bully the chromis AND each other after a week in the tank. I removed and returned all but one yt, wich I thought was the mellowist. It harrassed the chromis intill one died. I threw it in my qt tank with a new cow fish. Three dead enough said.

 

i put in 5 chromis with my yellow tail and my yellow tail bullied for about a week now their buds