Just reading what you've written, there are three answers.
Does it make a (pure) Deathwing army for viable - Absolutely not.
Deathwing models just don't have the firepower to make shooting twice viable. To put this in context of how wrong GW has got Terminators in general, they've gone from 2 shots at 24" to, 4 Shots at 24" if stationary & 8 With command points to now 4" all the time and still shots with command points and they are still bunk. - Grade (E-)
Does it make a Death Raven army viable - No.
There's just no way a Death/Raven army is going to generate the command points (and use them pragmatically) to pull this off, and the instances where you could do it, deep strike is too easy to screen off with cannon fodder, and the few instances you could do it with no obvious counter you're putting to many command points into this.. (F)
Does it help a Greenwing army? Well yeah, I've got to give you that as it's an option. But ultimately this is actually probably the worse use.
However, you'd need to take terminators, and enough to make it viable, and Ravenwing bikes, and fill out the FoC. And the points you're committing is now to great not to use this. And there will always be a better strategery for your army build - In the context to what you could have in a "greenwing army" (F-)