Haki negates regen and if she doesn't have any organs then regardless of if she lives or not she can't do anything.
not for her level of regen, for one she is the Juubi incarnate possessing Madara's body, she doesn't really need her organs to be alive.
Why would Luffy let her do that?
because he can't really kill him.
Fair though, doesn't it need to pierce for it to work?
yeah
Yeah, if we give Kaguya high regen then she stomps him.
She has never been shown to be able, or at least never did manipulate her entire planet at the same time and uses the planet to attack isn't really making a difference.
her power is described as taking control of the environment in the dimension which should be planet-sized with some even reaching the size of a star, given that she already shows the ability to make a TSO that would have kept expanding to the size of her dimension and someone inferior to her in Madara, can spread Tree Roots across the planet with his power, she likely can.
Yes it will, gives him an edge in close quarters combat meaning he can get the regen neg dura neg hits off.
which won't do anything to her level of regen
I never agreed with that, and regardless Kaguya has never tried even once to put someone in a genjutsu during combat.
She did it on the entire planet before fighting Hagaromo, which was the only time she could have because Hagaromo, Hamura, and Sasuke are immune to the ability.
saying that she won't when she's only had one fight in the entire series and one of the two people was completely immune to it is stupid.
That just leaves her open for an attack.
Luffy only has one attack that can beat her.
Luffy has a huge edge in cqc and we mutually agree that punches and kicks won't work so her beating him with physical attacks is barely a talking point.
she's not much of a physical brawler so its not that big of a deal.
The flowing Haki from Adv Buso won't even get through TSO without getting erased and deconstructed.
He's never gonna do that.
that's the only other chance he's got besides Bajrang,
it's not really in character but was trying to give him something.
I feel that Luffy tagging her with Bajrang Gun is likely enough that he can for sure win.
it really isn't.
its far more likely that Kaguya just touches Luffy's country-sized fist with a TSO or AKAB than Luffy tagging her with Bajrang before she either TPs herself out of the way or hits Luffy.