Yes, she landed the last attack (assuming Absalom didn't go unconscious after being sent away by Sanji), but I think we're falling in an irrelevant "technicality"; especially considering the point of mentioning him wasn't defeat per se but versus. Sanji is his main versus, has a two-chapters fight with him, the guy even ate the cook's dream fruit, and ultimately leaves him so weakened that a technique that was harmless before puts him down with ease. Sure, technically Nami was the one to land the last hit, but Absalom was Sanji's fight and that's how he should be understood in terms of versus, in my opinion; the only reason why Nami was the one to ultimately put him down was her fulfilling her subplot vendetta.
