"Pre-Plasma Storm"? Why not talk about the Post-Plasma Storm metagame, since that's the set Klinklang is going to be released in.
You don't get the strategy of most Klinklang decks do you? The deck is mean't to be completely steel types so that once Plasma Klinklang is set up, Exs become useless and can't attack anything. I get your strategy but your better of using Switch over Keldeo and Darkrai as switches don't give prizes. I also see you forgot Cobalion NVI. Cobalion NVI is in most lists as it counters non-Ex attackers and most people play steel in this deck because with the coming of Hypnotoxic Beam and Virbank City Gym, Hammertime is going to be every Special Energy using deck's worst nightmare.
One of two things will happen with this deck. Either people are going to write it off at first and it'll do well the first week of states. Yet the next week everyone and their mothers will be playing benchtini or some other fire type and Klingklang will do crappy, as a surprise benchtini drop will absolutely screw a klingklang players day. The second senario is that people don't play it week one, everyone takes their fire techs out of their decks for week two, and klingklang plays well.
To be fair, the same thing could be said about Blastoise/Keldeo. A single shaymin ex would destroy the deck after the keldeo player took 2 prize cards. Victini is not going to be a problem for the deck for the same reasons shaymin is not a problem for Blastoise/keldeo.
the big problems with Victini though, are its puny HP, getting OHKO'd by Cobalion-EX, Registeel-EX, Cobalion, or any other attack from a Plasmaklang deck.
And as for not having enough energy for that second attack, you have to think how much time it will take to get Victini going.
You'll need a fire/prism/blend, an energy switch (preferably), and a 5 other Pokemon in play, including the normal searching method to get Victini.
If the Plasmaklang player has had 5 turns so far they can do it.
Also, like Shaymin, Victini is going to be your worst starter.
It's not as if you can steamroll the deck with one 70 HP, awkwardly typed, hard to attack with basic. Not to mention the high possibility of a Righteous Edge right afterwards destroying your Prism Energy.
I feel like we can't even talk about how "good" this deck will be until we know what's coming in the meta.
I hear people talking a bunch about playing really bad fire cards just to counter this, which isn't even close to being viable considering Stoise/Keldeo is still an incredibly good deck.
Why not look at already established decks that will give this one a hard time?
Landorus/Tornadus/Mewtwo/Bouffalant/Terrakion aka "White Tea"--or whatever you want to call it--just got a whole lot better with Virbank/Hypnotoxic. Bouffalant and Terrakion are good attackers that can both two shot Cobalion EX and with lasers/virbank, two shot PlasmaKlang. They can do some mean damage turn one with their Tornadus EX/Virbank/Laser (90 damage) or start with the early pressure from Landorus before PlasmaKlang sets up. With Scramble Switch in the game, you're in for a tough matchup.
A good Klinklang player is going to play NVI Cobalion. His second attack is just TOO good for this deck to not have. Energy Press isn't terrible, either. I also have been going up and down from 1-2 Shift Gear Klinklangs in the deck. It's great for Max Potion.
It's good when it sets up, but just like a heavy steel Pokémon, it takes a while to go on the offensive. I've been testing the deck and while fun, it can be frustrating.
You probably should have ended your post right there if you believe it to be true.
1) How can you declare them to be "bad fire cards" given your first sentence?
2) Why are you ignoring that most players are talking about adding in an "okay" Fire-Type like Victini into otherwise successful decks? This kind of countering is as old as the TCG itself!
Take Blastoise/Keldeo EX decks; they rely heavily on Pokémon-EX to attack with and aren't much faster than the proposed Klinklang builds. Yet if Klinklang reduces their effectiveness, it might allow some Fire decks to take hold... which in turn causes a vicious cycle, since that would likely cause Klinklang decks trouble and make it easier for Blastoise/Keldeo EX decks to re-emerge dominant.
Though it will be hard to run both Aspertia City Gym and Virbank City Gym, or will the decks abandon the former for the latter?
Again, you are firmly predicting the future when you basically said not to. Otherwise, Cobalion is slower than Cobalion EX. The latter already bypasses safeguard effects, so the only reason to run Cobalion EX is for its attacks or because you want an attacker that isn't a Pokémon-EX. Energy Press is less impressive in a format with so many hard hitting attackers that either don't use much Energy or discard it... while also being 50-60 HP bigger.