I run a 4x54W on my 75. I keep all types of corals in there. Just have an understanding of light requirements for the different coral types and place them accordingly.
Have plates, frogspawn, chalice, LTA, zoas, favia, acan, Duncan. I guess a lot of lower light corals but the LTA found his home at the bottom of the tank in a cave and comes out the end when the lights are on. He has been doing great for the last 3 months. See pic. He was really bleached when I got him but has colored up well.