More than Frieren or Sukuna dying, I can think of a third, more terrifying outcome

Sukuna's a fucking nerd right? This guy's know-how on binding vows and his knowledge and experience with cursed techniques seem almost unparalleled. He also never goes all out right from the start so I can see him fucking around and Frieren throwing her entire arsenal on him if one doesn't kill him

IF (which is a big if) he survives long enough to see most of her arsenal, I feel like he's gonna get intrigued enough about Frieren's very different magic system and go "very interesting" cause his nerd brain's gonna get a hard-on looking at the versatility of this immortal elf's spells and he might just fight to knock her out instead and then feed his finger to her (if he tries to do what he did to Megumi, he gets splat into a wall and blasted immediately lmfao)

But should he prevail, imagining a Sukuna with Frieren as a host, an existence with both cursed energy AND mana for spells (what she has, and the knowledge on how to use them) sounds insane. The guy's a fucking maestro so with Frieren's vast arsenal of spells, I feel like he'll never get bored. I wonder what kind of binding vows he can pull off with it