The Trice isn't horrible in the pow by any means. It's a little larger than your normal deck. In saying that, if you want a GREAT powder board then the Beast probably wouldn't be it, it'd be good but there are better ones out there for sure.
Ok so I just had a more detailed look at the specs. I was probably a bit hasty in saying it wouldn't be a great powder board - it probably would. But there are still better I think. As far as I can see it's got everything covered except I'd like to see it have a little more taper.
For a dedicated powder board these are my current picks (and there are so many more out there):
Arbor A-Frame or Shreddy Krueger (2015)
If you're set on a Mervin board then I guess the Lib Tech Birdman is the best pow specific board in their lineup. From memory I think ETM might have one and loved it.
Don't restrict yourself to one brand though, there's a lot of fish in the sea.