Enbuoh isn't too good, in my opinion. Sure, you can easily attach energies very fast, but Enbuoh is a Stage 2. With Rare Candy's new ruling, that already makes it hard to play. Even then, the only other way to get it out fast is to use BTS, which will be rotated out shortly after Enbuoh comes into the format. After that, you have to manually evolve ANOTHER Pokémon (which will most likely be another Stage 2). That's extremely slow. It doesn't matter how fast you think your Fire deck is, you simply cannot expect to get out your Charizard/Blaziken/Infernape, Enbuoh, and your 2-3 Ninetales in a matter of a few turns without one of them being Knocked Out.
It's a good card, but it's just not in the right format.