I'm close to pulling the trigger on a male + harem of anthias, seeing your stocking list makes me think it's doable. The sheer number of tangs astonishes and frightens me, lol. My prob is that I'm at 3 tangs already since the rabbitfish have a similar bioload as a similar sized tang, I'd love a powder brown/blue to add but I'm scared of fighting nitrate & phosphate and just not having the room.
I finally got into a groove with keeping my nitrate about 20 and phosphate at .06 -.10 but I am changing 15% water every 7-10 days.