Slow, inconsistent and depends very much on your luck. No, it isn't a good combo. But poryz with delcaton engine...now that'll work. Discard energies, bring it back, then flip.
The thing about garchomp is that there's practically no way to speeden it unless you're using togekiss. And if you add poryz with it, you get to dominant attcakers not helping each other. Though they look like they help each other, they don't.