What are you looking for advice about?
Things I see of concern are:
Naso Tang, and yellow tang need MUCH larger tanks. Also the birdsnest coral is very difficult and needs really good lighting.
If you remove the tangs, I think that your stock looks good. I wouldn't add any more fish even after removing the tangs.
Liveaquaria says:
"The Naso Tang, also known as the Orangespine Unicornfish, darkens with maturity. Naso Tangs from Hawaii are often more brightly colored than those found in other areas. As a juvenile, the Naso Tang from Hawaii is dark gray with a blue stripe following along the dorsal fin and an orange stripe in the anal fin. When matured, the body takes on a reddish-brown tone and the juvenile striping is supplemented with additional color. The tail takes on a lyre shape with a yellow vertical bar towards the back. Two orange patches appear at the peduncle spines near the tail. The face undergoes the largest change. A thin, black mask forms between the eyes and mouth. The mask is outlined with bright yellow and the lips develop a reddish-orange color.
A 180 gallon or larger aquarium is necessary to provide plenty of swimming room, and places to hide, with a tight-fitting lid provided to prevent jumping to escape. It is aggressive towards other tangs, but peaceful with other fish in the tank."
"Though most common to the reefs of Hawaii, the Yellow Hawaiian Tang's natural habitat is actually widespread throughout Indonesia and the Great Barrier Reef. The Yellow Hawaiian Tang is also known as the Yellow Sailfin Tang or Yellow Surgeonfish. For best care, it should be housed in an aquarium of at least 100 gallons with ample room to swim. Like other Tangs, this member of the Acanthuridae family demonstrates territorial aggression towards its own species, or Tangs in general. Therefore, it is best to keep just one Yellow Hawaiian Tang per aquarium, unless multiple Yellow Hawaiian Tangs are introduced into the system simultaneously."
