If I remember right and it has been a loooooong time since I had damsels in my tank (like probably 15-20 years ago) the domino's are the most agrressive of the commonly available damsels.
Honestly, and I know some will disagree with me, damsels are the goldfish of salt water. Great starter fish for newbies very hearty and inexpensive but once you start progressing they are the first thing you want out.
How big is your tank and how long has it been up and running? Do you have a bunch of liverock? I am still failing to see the need for the emeralds in the first place.