How high should i hang my led lights?

Hi, I have a maxpect razor 180w 15000k with 120° optics over my 75g 4' long reef tank. I currently use the legs, but I want to hang them to get more coverage. What's a good height? I have mostly low light lps and soft corals. But, i have 2 bubble tip anemones at the top and a new 4" maxima clam on the sandbed that are doing great. How high should i hang my lights so everything has enough light? Im worried that if i move it up too much it wont have enought light penetration. I am slowly ramping up the blues to 100 and the whites to 60 maybe. I also have a current usa marine orbit pro 24-36" (I know its small, but it was used and cheap) as a supplement light in the middle. Would u hang these as well?
Thanks!!!!