T5 Bulb Selection for Mh/T5 combo fixture - SPS Tank

[brianspider]

Hey all,

I know there are posts out there about t5 bulb selection, but I was hoping to get insight about selection specifically for a mh/t5 combo fixture over a SPS dominant reef. I am running a 400w Radium bulb on the MH. Need a four bulb t5 combination that will best compliment the radium. My goals are to best optimize both growth and color. Thanks in advance.

 

[StikHedRon]

2 ATI Blue+ and 2 ATI True Actinic

 

[brianspider]

any thoughts on 4 blue+ or 3 blue+ and a purple+?