I place all these characters into two sup tiers.
One is Pirateking lvl(the top of the top tiers)
The another high top tier(strongest top tiers but still weaker than Pirateking lvl).
In that case I see it like this:
Pirateking lvl:
Roger 108
Primebeard 107
Prime Garp 106
Xebec 108
High Top Tier:
Sengoku 99,5
Kaido 99
Shiki 97
Rayleigh 97
Prime Big Mom 98
I think high top tiers fighting each other is very close, on bad days even Kaido could lose to Rayleigh. But if I could choose I can see Kaido beating Rayleigh around extrem high diff.
These guys are very close in power.
The question is rather who are the Pirateking lvl of the new era? My bet are Teach and Akainu, Dragon(maybe) and maybe Shanks(not sure yet).
Depends who face Luffy first and fights him, push him to extrem high diff.
Like the general numbers, bro, BUT Kaido that low is a crime
At base he already has G3+ oni strength (~ Luffy's ID CoA power), then he can buff his CoC power via sake and he can additionally buff himself up physically.
He's likely 3 PUs above a human top tier using CoC boosted physical attacks.
Drunk and buff he might have attack power twice as high as others. It was paired up with OKG afterall.
Add that he has FS and insane dura/endurance and stamina. I really think he beats Ray f.e. 10/10.
That WSC title was justified. If not for joyboy 2.0 he was practically unbeatable. I'd put him at a 110. He could likely even suicide bomb all of them with flame dragon torch. It's surreal.
And imo the mid gen as a whole is ciminally underrated and surpassed the old gen. Imo Akainu & Aokiji > Garp & Sengoku, Dragon > Garp atleast, Shanks/silhouette man/Mihawk ~ Roger.
Battleship bag training and Roger's signature move getting re-used paints a certain picture.
It's a gen full of S-class logia awakenings and haki gods. With Kaido there were likely 7 characters around that PK tier, not counting Imu and BB & Luffy (new gen).
I will double down on that, when it gets confirmed that Garling scarred WB, which would likely mean great portrayal for Shanks, Mihawk and silhouetted man and by extension those who will fight them.
So right now I think there are approximately 7 characters around that PK lvl, with Imu and Luffy 9, but imo they can likely even tap into god tier for some time (ggn giant).
Final saga will have up to 15 major fights that's going to be mind blowing ig.