I have one of the QuickBurst relay launch controllers. I made a box to take the one input and turn it into 8 igniter whips. Worked great off using a 3S lipo as a battery. I've done 8 cluster group launches that were a mix of old copperhead igniters and estes igniters and they worked great. Everything lit with 1-2 seconds of each other.
I used a home built rig with some switches, a motorcycle battery that had one bad cell, and 50ft of lamp cord going to the clips. I launched 3 & 4 motor clusters of Estes motors all the time. The key isn't the controller so much as the output the battery is capable of. Any available 12V controller that can accept a motorcycle, lawnmower, or similar sized LiPo battery should be enough for Estes clusters all day long.