How big is your tank? If it is 4' tank or less, I think it is best to keep just a pair (1 male and 1 female). The reason is that the male and the big females are very aggressive toward the smaller females. If you keep like 1 males and 2 or 3 females, the smallest female will get beaten up by all the bigger females and male and would quickly die in a small tank.
Lyretail Anthias is one of my favorite fishes but they need to be fed alot. You can feed them once a day and they still survive but they would lose those beautiful colors and become dull. I usually feed my Anthias once in the morning and 2-3 times after work in order to keep those vibrant colors. Also need to feed a good variety of frozen foods as well, not use frozen mysis shrimp everyday. It get very expensive after awhile trying to feed those fishes to keep their vibrant colors. I kept 2 pairs of Lyretail anthias before. The first pair lived for about 6 years or so. the second pair also lived for about 6-7 years.
The one from Indian ocean has more red on its body. The one from Indonesia or Fiji has red and purple on its body and it looks great coming in from the ocean. But it is quite difficult to maintain that Purple once in captivity after a year or so. To keep it in our tank, I think the Indian Ocean ones are better.