I think you are talking about a Lunare wrasse,Add the tusk before the Lunare,because the tusk is a wrasse,and they will get along better if neither of them have territorries yet.I had my green bird wrasse in the tank first,and when I put my tusk in,the bird wrasse chased it around for a while,now they are fine together.Lunare wrasses will pick on almost anything put in the tank after him,so put it in before the triggers,they can hndle it.Also put your eel in first,this way it is easier to get him to start eating,withought other hungry fish getting to it,and it is the hardiest and least expencive fish on your list.