Doffy != Kaido but besides that.
He never tried high end slashrs because they would not work.
And shambles only worked externaly. You could only give the credit for GK.
People always call Oda out because they believe Law's fruit is too hax and should destroy everyone.
But Oda has been very consistent, his fruit can't use hax against stronger opponents. Now it depends on how strong the opponent is he can use hax against.
Like vergo was a bit weaker than law and thus Slashes worked.
Smoker was weaker as well or on his level. Thus Internal shambles worked only after some fighting.
Doffy was much stronger than Law and thus only his Strongest Attack GK worked.
Kaido is much much stronger nothing will work until he is beaten down a bit..
Stop blaming Oda and read the story as intended.
They wouldn’t work based on what? Doffy himself fighting to prevent Law from using hax. Why all the trouble over something that won’t work....
Anyway all these is baseless nonsense. We know specifically how laws abilities work.
He can cut anything. How strong somebody is doesn’t, an has never negated abilities in one piece. Kaido being a Yonko isn’t stop sugar DF abilities.
Haki how Kaido would do so, but the thread asking about the situation without haki.