I'm 6ft6 and around 280lbs. I fight, but I'm a kickboxer so I'm not making weight at 265lbs.
When I'm injury free and lift the barbell, the only thing that makes me feel remotely more powerful for crossing over (as far as barbells are concerned) are squats (ass to grass), deadlifts and some kind of clean or clean and press.
It is very hard to maintain lifting strength and not compromise my work rate immensely.
It's easier to get moderately close to powerlifting strong as long as I'm happy to be a one round k.o king but I never want to be the guy doubled over for oxygen after 3 minutes.
I bench 396 to powerlifting pause standard. During my boxing/kickboxing training, which is 11 months of the year, I'm lucky to hit 308. Same with squats and deads. Absolute strength is fussed over here, really bad, as we saw in the John Jones deadlift thread.
I get the obsession that SD has with fighter lifting strength. It fills some kind of obscure delusion that is very American and maybe slightly a little less, but Western.
It's the same with Hollywood actors. "I bet he could be a professional athlete" or "such and such benched 400lb for his *insert Marvel* role".
It's fanboydom and hope that your favourite fighter is also some kind of all around superhero. But weight lifting for MMA is so far different from general powerlifting or bodybuilding that sometimes I lose my mind at some of the stupid shit people come out with on here.