I feel like Calamities are a bit different. Look at the he portrayed them this chapter. For sure Sanji/Zoro strike them at the end but they are depicted as the "calamity" forces Kaido's crew is known for. How many times had Queen been attack/struck and been perfectly fine?
Personally I think these fights are going to be decently longer and far more brutal than the F6 ones. The thing with Jack is that he still has a hybrid while Inu doesn't have sulong. Plus, Neko isn't there and he is missing a leg.
I guess we'll have to wait and see. What i was proposing was a strawhat teamup against Jack if Inu can't win. Plenty of underutilized crew members lingering around for it. Either that or Yamato gets sent back down eventually and encounters him.