You'd have to have multiple Infernape at the ready on the bench for successive uses of Flare Drive. And up until my most recent version of the list, it did have two Burning Energies. I determined at some point that having a couple of Miltanks in the deck hitting for 80 would make up for the lack of Burning Energy. The deck is open to adjustment, certainly; a Karen to replace the Sacred Ash if it gets released here because it fulfills the same purpose as SA while also denting Night March, for example.I'm not sure of the viability of Infernape on a tournament level. It requires constant Blacksmith use to even use his first move.
It's too bad the Stoke Charizard-EX is getting rotated; he would make a good partner for this deck, sucking up tons of Energy to use as fuel for Flare Up.
I would also add one or two Burning Energy. It may not contribute to Flare Up's requirement, but it helps you consistently pump out 120s.
There's also the fact that with the amount of discard the deck has, Infernape doesn't necessarily have to use Flare Drive consecutively. Battle Compressor + Scorching Earth + Flare Drive = six energy discarded in one turn. Considering that this deck wants to cycle through cards really fast, I don't think it's unreasonable to think that, more often than not, the end of your turn alternates between Flare Drive and Flare Up pretty consistently. If not, Miltank fills in the gap and finishes off anything that Flare Drive couldn't OHKO.
Again, it's really up in the air whether or not an Infernape deck is competitively viable. But the realization that a Flare Drive/Flare Up pattern is feasible helps its chances.