"Its Raids where Hunters become rather useless."
First part of the same quote you gave. I apologize if it seemed that way and upset you somehow, but I still wasn't wrong.
But that's simply ignoring acknowledging a Hunter's current ability pool is, again, far more situational than what's provided for the other two classes, which Skyline even acknowledges twice over.
Basically, I'm not seeing why bring up your examples when, again, it boils down to having a team that can survive, someone isn't going to say "Hey, we need someone invisible to scout this maze. Let's keep a spot open and look for a Hunter."
Besides, the golden gun is far more useful, and even then, people have enough guns and ammo to take out the oracles. This is further supported by the fact guns that do bonus damage to oracles exist.