It's wild to me how people are scaling Loki so high with such confidence before ever seeing him fight. Not even based on what people said about him, but based on your assumtions of what might have happened based on what one person said.
Even if Gaban said Loki was stronger than him or that beating him was what made Shanks a yonko, which he didn't, that isn't how One Piece scales. Big Mom was portrayed like an unkillable god, then got man handled by Jinbei and Franky, and Law face tanked her CoC punches.
The fact that ya'll can take one or two panels of Gaban saying he's really strong and completely ignore a legitimate invitation from Luffy for nothing but powerscaling reasons is crazy.