Most of them don't need to be involved in their own individual fights. Yeah most of the fodder will fight fodder yeah but some of the more significant ones will help take down the big guys along with the strawhats
Just like hyo said
When it comes to the heart pirates hopefully theirr just parking the sub and are gonna join eventually. Ima be dumb salty if Jean bart and them just wait till everything is over.
And hopefully at least some of the scabbards wont be totally useless after kaido.
If they really get their asses beat not leaving any meaningful damage on kaido and essentially being usless after. That shit would be just hella depressing