let me get in the mix real quick
shikamaru only beat haiden due to the fact that he's a mainsubcharacter or in other words he's not really important to the story but isnt going to randomly die for no reason at all like jariya dieing if he didnt die then every thing that happened in the leaf wouldnt have happened and the fourth would have shown up and yada-yada-yada but the thing thaqt really got me is that ppl are saying neji cant beat heiden... i mean have any of you forgotten byakugan im pretty sure neji would be able to cut the hairs when they got a lil to close to him and he would have seen the 5 or 4 hearts konwing o well i have to kill this guy 5-4 times and the only reason the spider guy hurt neji so bad is cause long distence is the only thing that can really effect neji unless your gonna risk going close combat and dieing in one hit to the heart so neji would easily beat that thread/hair guy
but this isnt about neji this is about sound vs akatsuki in truth akatsuki would win simply cause there akatsuki... and the argument about k&k knowing H&K weaknesses is also true in reverse cause last time i checked oro was in akatsuki with both of them so why would they be able to know K&K weknesses
plus i kow of a way to make it so H&K are pretty much unstoppable kukazu could give his heart to the thread guy and sense that heart is immortal the thread guy wouldnt die and kukazu wouldnt either... so yea i just pretty much used the show it self to godmod the living hell out of K&k
final verdict H&K win by a long shot