ok I'm here, one question, how the hell exactly will the luck nullification work on medaka, if literally the devil style didn't work on her either
It wouldn't be nullification, it would just be another character's luck, which does seem to still function as shown by Iihiko (a hero) being able to beat her when Ajimu couldn't, despite both of them being able to nullify Medaka's skills. Also, Devil Style did work on her; she only got 2% of the vote in the election without it, while Zenkichi, a normal, got 62%, when at the start of the series with it active she got 98% of the vote.
Also, because she just couldn't use scar dead to just open makoto's wounds and make him kill him, or even other abnormalities and skills that are useful.
She could, but that's not how she's ever opened a fight. She tends to go literally nothing > physical strikes > minor abilities > strong abilities if everything else does literally nothing (i.e. Iihiko).
also how she can't just imitate and surpass anything makoto does.
She probably could, but that's not very helpful if she's incapped. I do say "probably" because Makoto's powers may be too dissimilar to equalise to MB's skills.
BFR, she copies and then escapes from the BFR, or uses All Fiction to get out, transmutation, same as All Fiction and negates the effect of transmutation
I don't really understand how she'd use them to get out. I guess copying BFR and BFR'ing herself back makes sense, but idk how she's use AF under transmutation. Hell, we explicitly saw that Kumagawa and Medaka were unable to use their skills when they were de-aged, they're not the sort of thing that gets kept no matter their form.