Man, I forgot to ever update the thread.
I lost 100% of my coral shortly after the final update in the thread, in all three tanks. It must have been a pathogen from the most recent broodstock additions, because it was bad enough to kill all of my Aiptasia too! Literally all cnidarians died. Tunicates, sponges, snails, fish, etc all survived perfectly fine. 7-9 years of coral growth, thousands of dollars worth of frags, and of course all of my broodstock dead in the water.
So after that loss and getting reset to square 1 for the third time, I decided to shelve the project until I have the heart to give it another shot. It was so massively heartbreaking and I've only just now obtained corals again (gsp!).
I'm beginning to see evidence that Cynarina, acanthophyllia and indophyllia rarely survive more than a year or two in aquaria... Success stories are very, very rare at least. I'd be willing to try again some day, I still love them and still have ideas for it all the time... But after that disaster, I'm never getting slack with quarentine again.