How does sasori beat her? Oh, Let me guess, his poison will affect paper.
All konan needs to do is go into paper goddess form and she's immune to his entire arsenal.
Paper bomb hiruko till it's open.
Bypass sasori's traps and puppets and Paper bomb sasori's real body till he's dead.
Sasori's going to have a much harder time hitting her than she'll have hitting him.
Explosive tags blows up his puppets? but I don't see her taking on iron sand, although the sand won't cause damage dude to her paper body jutsu but regardless her chakra is limited so I guess sasori can keep attacking via iron sand until her chakra goes down.
And how exactly is Iron sand going to do anything against her? In true paper goddess form she'll literally just a mass of paper. She swarms sasori with paper and kills him. No amount of Iron sand is stopping that. Even if you assume sasori can make an iron sand dome, he still needs to have it opened to be able to see what he's doing; Konan can pass some paper through the hole and kaboom.