Your not being limited by the transformer here, your limit is your 400amp 240volt panel. at 80% (I wouldn't recommend going much above 80% though) you can have roughly 46 s9's

fun fact those transformers are under rated and over built. Ask the utility company, on a 2500ka unit they told us they were ok with loading it to 120%

*EDIT* Didn't see this was 3 phase! You are correct on the 95 machines you should be ok hooking those up!