It’s an interesting showdown, I think. An early main antagonist vs a New World mid-level underling. Can’t say I have a strong feeling either way. Perhaps if Arlong was out prison and growing stronger I’d give it to him, he certainly feels like someone that would learn Haki.

Babanuki, high diff.

Idk, Jinbe was pretty shocked when Arlong was defeated.

Babnuki should take this low diff east blue characters are generally pretty weak since they popped up at the start of the story