Mike, I think in each group you will have one morph into a male. Case in point is mine. Wow, she's been a lone female for at least 4 years since the male died and as soon as I placed another female, within days she began the transformation. It's pretty mind blowing!!! Like you, at first it was my thought, as well, to do several species of anthias, but continued reading hasn't turned up any hard evidence that I'll be able to keep to all female groups and I haven't seen any male anthias that will tolerate another in the same tank. If I even have them next to each other in display tanks, they'll scrape themselves up trying to get to each other through the partition. Sorry for the bad news
