I would feed, but not too much. They can eat A LOT, but they dont digest food that fast, so I have had critters (emeralds, peppermint shrimp, fish) rip the acans open to eat the food out...not pretty.
Also, it seems that if they are fed too often they can start to recede. I would feed once a week "ish," and Rod's Food is great for almost all LPS (SPS love the GP too!)
78 is fine for them, I've never noticed them being too temp sensitive.
I've kept them in lots of lighting, overall lower is preffered. I keep mine on bottome, 18" down under a 250w DE MH. Same with flow, they always look better in low to med., but they dont mind higher flow, just not real high (their polyps wont puff).
In general, they are one of the easier corals to keep IMO/IME.
HTH and GL!