None of them have the antidote so the poison will harm Sakura even after healing.Without the antidote that counters the poison all of her medical ninjutsu will prove to be futile.
Umm, she does have the antidote, she's fought him before.
She can't dodge his barrage of posion needles which is why Sasori easily wins.Its only thanks to Chiyo who knows her grandson inside and out in terms of his attack patterns.Sakura doesn't have that feat.
Like I said, Katsuyu has not shown any weakness to poison, so as seen many times before, she can encase Sakura inside her body, shielding her from the poison, if she even needs to.
Poison fog kills her honestly Sasori imo doesn't need to resort to that move.
Poison fog kills her in a cave yea, but open terrain, it's limited to one area, not as effective, a situational jutsu if you will.
So Sakura starts off with Katsuyu? Sasori can easily use iron sand to attack the miniature clones and Katsuyu hasn't shown the ability to counter poison especially on Sasori's caliber.Once she and Sakura inhales the poison they lose instantly.
Sakura has come across Sasori before, as a medical ninja, I'm sure she's made antidotes and built antibodies against it since she has already been poisoned by it in there fight, poison is not an issue. Why can't Sakura start with Katsuyu? If she needs her, I don't see why not, Naruto started fighting Pain with his summons.
You come up with basic scenarios that benefit only Sakura.U_U
No, not really scenarios.