Both are solid all-mountain options. Daemon's reverse camber makes it easier to pivot around in tight spots, so if you stick mostly to moguls and trees, the Daemon will be a bit easier. The Masterblaster is more stable at speed and, in my opinion, is more energetic and fun on groomers. Daemon's reverse camber makes it feel more smooth than energetic on groomers.
And while the Masterblaster won't be quite as easy to pivot, it's still not a super demanding ski. Personally, I love the Masterblaster cause I think it offers a really fun blend of stability, pop on groomers and for jumping off stuff, all while not being as demanding as some more traditional directional all-mountain skis.
In terms of pow performance, the Daemon will float a bit better. Its wider waist and long, drawn-out rocker profile will help it plane above the snow better than the Masterblaster.
So I think it comes down to your preferences. If you mostly want a ski that's easy to turn and pivot, don't care too much about maximum stability and energy on groomers, and want something that will float slightly better in pow, then go Daemon.
If you want more stability and energy and a ski that's IMO more versatile across the whole mountain, then go Masterblaster.
Haven't skied the Mantra or Dictator 2.0, but Enforcer 100 might also be worth checking out.