Noo fuck way Kamazou or not durability doesn't change and Oni Giri with a scythe took out Killer and King tanked much stronger version of Oni giri.
Zoros Hakiless Oni Giri was portrayed equal to Killer's named attack, King took Haki Oni giri and Tora Gari.
King would mid diff and I am really being generous to Killer here.
He can give Katakuri an extreme diff and Marco a high diff tho
Killer high diffs Queen
Let's start from the fact that Killer would spar swiftly with base King, just like Zoro did in chapter 1023, so I'm talking about hybrid King.
And that Killer is clearly less durable than King.
Zanshu Claw was actually highlighted more than Zoro's Oni Giri, which was hakified but Zoro remarked that he needed to unleash more.
Killer deeply dented Kaido's neck, project that on King... I'm not saying that he would go down with one hit on the neck, but that if Killer menages to strike 2 or 3 of them on the same spot the situation goes
mayday for King.
King wind scythes are like those of Kaido's
Gale of Destruction, Killer danced through them. No reason to assume that King's are much stronger if stronger at all.
King charged attacks like
Tankyu Don would overpower Killer, who would get pushed back just like happened to Zoro. That attack is devastating and would make Killer spit some blood for sure.
Killer
Sonic Scyther would at least keep King at bay, while damagin him, and his agility and overall mobility makes him a well suited fighter to oppose King.
I think you're understimating Killer, the man doesn't go down before giving King an extreme diff. He has some chances to win too.