Read what I just said above--------Coral+ will pull more pink/red out of acros.
It doesn't matter what the mix of the bulb is..........I'm basing this off my own personal experiences with T5 bulbs and getting max out of reds & pinks.
If you want examples you can see here in my thread. There are plenty of pics of pink & red corals.
http://reefcentral.com/forums/showthread.php?t=2197142&page=6
What I'm stating above are personal experiences of my tank and other tanks around here locally that I've worked with that have LED/T5 combos as well as Powermodule hybrid units.
You're a bit limited due to only four bulbs so to get the most out of them for acro colors 2 blue+ & 2 coral+ will work best and then the LEDs act as supplementation or tweeking for visual appearance.