I tried this strat as it appears, and it didn't come close. Alpine Foxling Kit only got two Flurry attacks in before dying, then my Zeppelin immediately got swapped before it could do anything. It's possible that the foxling kit took a large hit which threw things off.
I tried a different fox with a different breed and didn't have any better luck. I tried with the B/B foxling kit again and got a little closer, I might have beaten him that time if Flurry had hit once or twice more.
All in all, this strat probably works, but there is definitely some RNG to it. And there's no reason to use a strat with even a little RNG if you don't have to when there are other strats available. (Apologies to those without an Unborn Val'kyr.)