Tank size for a given bioload -- future build

[t5Nitro]

Looking at moving my yellow and purple tang into a bigger tank when I move next year. I'm also interested in adding a powder blue tang, sohal tang, and magnificent foxface as far as the larger fish go. Potentially a regal angelfish as well if I were fortunate to get one eating.

The original plan was for a 72x36x20 ~225 gallon DT.
Any recommendations on change in dimensions for the given larger fish bioload? I can of course back out on some of these fish if needed. I didn't want to go longer than 72".

 

[ca1ore]

72” tank too small for a sohal. Fish is psycho under favorable conditions.