The Supernova are too strong for Kaido to face all five of them at once. Instead he'll get a 1 vs 3 and then a 1 vs 2 afterwards.
My scaling is something like this:
- Top Top Tier
- Primebeard with the Gura
- Awakened (?) Hybrid Kaido
- High Top Tier
- Hybrid Kaido
- Sakazuki
- Prometheus Fused Mama
- Mid Top Tier
- Low Top Tier
- Old Rayleigh
- Old Garp
- Old Sengoku
Anyway, your downplaying Zoro's feat.
- He didn't stop the attack for one second but several
- It's not at all clear that Primebeard would be able to completely block the attack himself
- He'll do better than Zoro, but how much better is unknown
- We don't know how strong Mihawk is
- Mihawk's COA may well be on a level above even Prime Roger and Primebeard given his Black Blade
- We don't know how far from Mihawk current Zoro is
- We don't know how much stronger than Mihawk EOS Zoro is
We don't know what difficulty the Admiral he'll fight would be.
We don't know how they would compare to Kaido.
- Kaido's Awakening is speculative
- Kaido's Awakening might be a passive that only boosts his regeneration
- There may be no separate Awakened form.
- Some top tiers didn't have Awakening
I'll consider Awakened Hybrid Kaido's strongest form, when he shows it.
- Zoro has yet to show an attack stronger than the Hiryuu Kaen he used in 1002.
- I think it would be the final attack he lands on Kaido.
- Kaido and Mama may have stronger combination attacks, but I doubt they can replicate this level of firepower alone, let alone exceed it.