I have said it once and I'll say it again . pretty simple
old wb not using his fruit is equal to shanks
technically his clash with roger had advcoa and none of that with shanks. more than likely his haki had already regressed.
and
equality with wb using his df and not just his blade. matter of fact he held back wb bisento with his hands in his pockets. go complain somewhere else .
my stance stays
bm , kaido are the top two yonkos