Well, the BFG is calc'd at
7-C; there's no mistaking that. Cyberdemon, Hell Guard, and Spider Master Mind all have
Town level durability due to taking multiple hits from the BFG 9000.
We actually had an agreement that Berserker does give Doomguy
Town Class striking strength, but that Has to scale to his durability because we can't violate Newton's third law; which I mentioned above several times.
The bosses also have
7-C Attack Potency because, not only can they harm Berserker enhanced Doomguy, but Spider Mastermind is listed on his profile that he is capable of
killing CyberDemon.
And of course, Doomslayer. The lore makes it perfectly clear that Doomslayer would have to be the god tier of the whole Doomverse. Not only has he fought and effortlessly killed demons for "eons," he was also described as saying that no demon can stand against him; that includes the likes of Cyberdemon. Also, as for the glory kills argument; he doesn't just kill the boss tiers, he obliterates them. He completely blew up Cyberdemon's just by smacking it with his own horn; punching and using melee weapons such as a horn or sword still classifies as striking strength and is proof that just a simple punch could have done the job. He also effortlessly ripped off Hell Guard's head; Doomslayer should easily be
7-C through physical strength alone.
I honestly don't want to hear the Imp argument, because that's obviously just game mechanics. Still makes just as much sense as arguing about Mario taking damage from Goombas and Koopas, or Simon Belmont taking damage skeletons. And same thing with the Berserker argument; he has to have
Town level durability in order to have
Town Class striking strength; because otherwise, that strongly contradicts an important scientific fact proven by Isaac Newton.
Anyway, @MrKing might have more to say, but I think Hizack and Numbersguy also agree with us on the topic.