I tend to agree that starting the rics lower down, then moving them up as needed is the safest strategy. I have found some rics respond very well to intense MH lighting (tri-colors), while others seem to not "thrive" (like blues).
In any case, it's easier to move a coral up toward the light if it's not getting enough, than it is to rehabilitate a ric that has been damaged by too much light (IMO).
Kevin