1. Madara
2. Nagato
3. Itachi
4. Kisame
5. Konan
6. Kakuzu
7. Sasori
8. Hidan
9. Deidara
*Zetsu* Undecided
Deidara just falls to the bottom of my list I have no respect for him. His tricks are the same, explosions that can be evaded and the ones that are difficult to evade cause more harm to himself it seems. Also he was beaten by Sasuke, who couldn't beat anybody in the top 4 (Itachi let him win, and was going to die anyway).
Hidan had one technique or only used one that we ever saw. Cut off his head and without Kakuzu that's it for him. He'll eventually die since he won't be able to kill anybody. He ranks higher then Deidara because his technique is very useful in the sense he can inflict dammage and live while his opponent dies. Also it would be good for war because all anybody would have to do is to get him some blood from a powerful opponent and get it to him so he can use his technique to kill them instently without the hassle of working at it (Idk if it works like that but thats what I think).
Sasori killed the Sandaime Kazekage, he had skill obviously. He also was a complete master at puppetry turning his entire body into a puppet and being able to control a hundred puppets...that's about it. His weak point was dead in the center of his chest. If Chiyo and Sakura had known that ealyer he'd have been dead a lot sooner. That's another thing he got beat by a 16 year old girl and his grandmother I don't care if you took down a Kage that's not a good look. Him and Hidan I guess could be interchangable but I wouldn't say for Deidara. I think Sasori was the stronger of the two in that group.
Kakuzu went to par with Kakashi for a moment with the whole taijutsu thing, while his partner was fighting 1 guy he was up against like 5 other guys (Ino and Choji don't really make up much just...yeah). He was definatly stronger then Hidan and plus if Hidan were to use his technique on him he'd have another four hearts. He'd have to use it 5 times to kill him while all's Kakuzu would have to do is what Shikamaru did, burry his head (which has to be uncomfterable if he's still alive and all). Higher then Sasori no boubt.
Konan...that f***ing 10min explosion. That deserves to be in the top 5 She could change between Kakuzu but nobody below four I believe are really big shyt so whatever. She almost killed Madara (Izanagi with it's badassness saveing his life but he got the rinnengan so it's all good). She was taught by Jiraya. We haven't seen much of her fighting to say so I thought that had to fill in there for something.
Kisame...Now we get into the big shyt. Kisame was the deadliest of the seven swordsmen of the mist past and present. The previous generation may have been the strongest but individually Kisame had those guy's on their knees. He was called the Bijuu without a tail because of his freakin amazing chakra. Although Zetsu's clone fought KB, it was like a mirror image of Kisame and all his skills so that tells itself. Kisame was a legit monster with his fighting. The most destructive Akatsuki member and one of the most affective ones.
Itachi I'm not going to say much one because everything will explain itself. Amatersu, Susanoo, Tsukuyomi, MS, Brillient, Kage worthy. That's it, I'm sure nobody will object to his placeing.
Nagato, another one I'm not saying much about, mastery of the Rinnegan (less then the sage but still)
Madara...The fact that he manipulated everybody below (with the exception of Itachi) into doing what he wanted...come on people need I say more. Control of the Kyuubi, EMS (if he still has it Idk), lived against Hashirama, He's still alive after over 100 years. He's running things all day with no bull shyt from anybody (except Kabuto who has him in a male reproductive organs because of a special summon that nobody knows about yet).
Well this is my oppinion, agree disagree Idc I might argue my points more if called out or I might not feel like it, but its anybody's call. I love never hate just disagree.