I'm a little surprised you went with XML2 over the MTG2 for a flood application?
A high CRI or even a red LED, plus MTG2 LEDs would potentially add to the total output and the total flood, etc.
Is finding a hi CRI MTG2 and/or mixing MTG2 and XML2, etc, a driver issue?
The driver was part of the consideration. The other consideration was balancing the various attributes of this light. While it is a flooder I wanted to create something that had at least some punch to it so that I could light up large areas not just have a ton of light right at your feet. I needed the originating beam to be fairly tight to achieve my goals in finding just the right balance.