There is this common misunderstanding that Devourers would speed up Darkness decks, if anything, it slows them down. And all Darkness' expensive cards go along with this sloth. Devourers are, at best, pillars that slow you down by 2
when looking solely at your own quanta. Fire? One Photon/Spark + Immo and you can Deflag first turn if you wanted to.
Pulverizer + PA is really, really slow and limiting. 2 Cards and tons of quanta to get rid of one shield? It's mostly FGs that have enough Permanents due to their special decks and double permanents to use Pulverizer. Not PvP.
As for Deflagrating Pillars, it is not a goal on itself, it is a versatile way of using spare Deflagrations in the case there supposedly wasn't anything to Deflagrate. And I know from experience that from the 2 times I've actually seen
people use PC on my pillars, it's effective, since I lost those games.
Why the hell would you want steal in your deck if your obviously going to protect your weapon slots? just use explosion.
Explosion and steal are two different effects of PC, just saying that explosion is needed in a certain type of deck doesn't justify what you are implying.
I nowhere implied that the permanents would be protected and I wasn't talking about Rainbows either, not all decks have a complete arsenal of every quanta by packing a lot of Quantum Towers/Supernovas. Just a mono Darkness equipped with Vampire Dagger, Improved Dusk and Improved Steal, that might have to sacrifice it's sword/shield in case the opponent has a shield. But you don't know whether they have, nor whether you will draw your own shield.
Your point of balance seems to be tunnel visioned towards rainbows fighting FGs, while it's PvP balance that it should primarily be based upon. Deflagration is one of the most popular PvP cards available and for a reason. You're usually just wasting card space with them against FGs, agreed, since 2 more permanents will pop up in the time you Deflag one, but like you said, it's a different type of PC.