ok see i just got done watching sasori get rocked by sakura and lady chiyo and i was gonna say him but i wanna know what this weird mufugga is about...
I can't believe you actually consider Sasori to be the weakest Akatsuki member? just because he lost to women. Chiyo was an extremely powerful and intelligent kunoichi. She raised him, she taught him, she knew him since he was a child, and he more than paled to her in terms of experience.
Sakura, whether you guys like it or not, is extremely talented and was trained by Tsunade. Her shytty personality since then notwithstanding, she was very determined throughout the whole fight, and most importantly, she and Chiyo fought together flawlessly. One of the most prominent themes in this anime is teammwork, and those two are one of the most outstanding examples of it.
The sheer amount of advantages they had over him is ridiculous. Not only did they have antidotes to his poison, they also had the perfect counter against his greatest puppet: Sakura's strength. Chiyo even had previous knowledge of some of his puppets. But more importantly, she also had the single greatest weapon to fight Sasori with: his dead parents, the reason he was the sick f
*ck he was in the first place.
Chiyo herself makes it clear that she can think of nothing better to fight him with. At the very end of the fight, Sasori doesn't even bother to dodge Chiyo's attacks because he wants to be in his parents' embrace once more. No one, and I mean no one else in the Gaara Rescue Mission would've stood a chance against Sasori individually.
Zetus wasn't the stronger akatsuki member as other aktaskui. He's the weakest aktasuki member since he's only useful for spying and gathering information. He isn't even a combat type, he is barely genin level.