Yet... he still has no real challengers at the weight class.
Division = cleaned out
What in the actual fuck are you talking about. Stop drinking Dana's kool-aid, the only reason he has no challengers coz he refuses to fight any challengers.
He's only champion at Lightweight where he recently lost to the number 8 challenger, and only beat him in a rematch due to a bullshit decsion.
At Lightweight Khabib beats him, Ferguson beats him, Barboza beats him, Dos Anjos beats him, Michael Johnson beats him, Michael Chiesa beats him, and of course Nate beats him again.
And he certainly hasn't cleaned out Featherweight. Full-camp Mendes beats him, Frankie beats him, Yair beats him, Holloway beats him, Suberboy prolly beats him, and he needs to at least fight and beat Cub Swanson, Charles Oliveira, Brian Ortega, and Anthony Pettis before you can even begin to start claiming he's cleaned out just
one division without sounding overly retarded.