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If i think it again, it is Sasori, Kakuzu, Kisame

Sasori, Sasori's puppets were unique in that they were made from the still-living bodies of humans. These human puppets were more versatile than regular puppets, since, in addition to having many dangerous devices installed within them,they were also able to use chakra and perform jutsu. Any jutsu or Kekkei Genkai abilities possessed by the converted human were also passed onto the puppet. Sasori has a great knowledge of the human body, as shown from his brainwashing jutsu and his mastery over creating different types of poisons. His unique poisons, that he laced nearly every weapon in his arsenal with, took effect instantly, and one such poison could kill the target after three days of suffering. Sasori initially believed this poison to be incurable. Sasori was also immune to hindrances that would normally affect a human's body, such as fatigue, muscle failure, and pain, allowing him to move at full strength for extended periods of time. When smashed apart, he could simply draw the pieces back together and Deidara himself even admitted that Sasori was stronger of the two.

Kakuzu, he has 5 heart so cannot die just one time and also he can restore any part of his body that cut, The hearts captured from other ninja granted Kakuzu numerous elemental affinities, along with a vast supply of chakra. The raw power of each element Kakuzu demonstrated even made Kakashi, who is also capable of multiple elements, stiff with awe. The individual hearts could be released from his body and wrapped in a vast blanket of threads, forcing a heart into a limb before being detached or forming a monstrous body with a mask as its face.

Kisame, Kisame's signature weapon is called Samehada, a sentient, scale-covered sword, that shaves flesh instead of cutting it. Samehada is also capable of detecting and absorbing chakra, but requires Kisame's own chakra to perform the latter. Kisame can heal and replenish his chakra by momentarily fusing with Samehada. He can also fuse all the way to further increase his power along with adding to his shark-like appearance. When fused with Samehada, he gains the ability to breathe underwater using gills. While using his Water Prison Shark Dance Technique, he can take full advantage of that ability by drowning his opponents. In this form he can sense other peoples' chakra, and absorb it just by touching the foe with any part of his body. He can also hide within Samehada, which he states is flawless as he and Samehada have similar charka, that not even sensors can tell where he is. Only Kisame is able to wield Samehada; if anyone besides him tries to pick it up, spikes protrude from its handle, and it returns to Kisame's side. Samehada's loyalty seems to be only because it likes Kisame's chakra. If it finds a ninja with better chakra, it may turn to that ninja's side, demonstrated when Samehada protected Killer Bee from Kisame's attempt to slash off his legs. Despite its wavering loyalty, Kisame is capable of wielding Samehada against its will.

I'm not put hidan the immortal, cause despite being "immortal", he is still capable of dying from a lack of nutrients

http://naruto.wikia.com/wiki/Hidan#Immortality

Strongest to Weakest: Hidan, Kakuzu, Sasori, Deidara, Kisame and Zetsu

Well there in all the Akatsuki members the partners are/were...

Itachi and Kisame/Orochimaru

Hidan and Kakuzu

Deidara and Sasori/(Tobi/Madara)

Zetsu

Pain(s)/Nagato and Konan

I think all of them were all about the same in power. Except Nagato, Itachi, and Madara.

Kakuzu, Sasori, Deidara

Why would you ask this question and then exclude the 3 strongest...? Weakest is the shark guy. Strongest after those 3 would have to be the immortal guy just because he is immortal, although the rest of them are basically on the same level.

{SPOILERS} in the current manga zetsu is the strongest do to the fact that there are millions of him and are all pretty strong then tobi with his two eyes but we have yet to see him fight. then theres kabuchimaru who is stronger than tobi and has more man power due t his imprefect resurection. but he seems only good at sneak attacks and escapes. there is also zombie deidara who can now self destruct an infinite amount of times but he is still weak. the weakest is any of the zombies because they can be defeated by releasing their soul so many of them will die in an emotional fight with great ease i.e asuma loses to pics of kurnais baby (perdiction) like sai's bro lost to seeing sai's finished pics.

Well im only on naruto shippuden episode 77, so i think the kakuzu is the strongest so far :)

awwww u eliminated the strongest T_T

well HIDAN JUST DOESNT DIE!! but that doesnt make him strong...it just means you cant kill him so we really dont know alot about zetsu Kisame just wont die either -__- orochimaru was by far the weakest...all he has was his forbidden crap so im going to vote for Kakuzu or Deidara

Personally, I like Kisame. It may be because I like the water element, but he has the most badass fighting style! Plus he easily has the most chakara!

Hmm...Deidara probably. Kisame is pretty tough too.