true but still u gotta realize his chakra is on par with a jin but I mean we can argue all day but we will never know this isn't just one of those fights u can just be confident in or choiceI doubt it,he sure can make a small lake with his own chakra but I don't think it'll be as powerful as the one that he used against Guy because during his battle with Guy he has an entire ocean feeding that lake and no need to mention he got extreamly weaker even after using an out side source,pulling water on his own and using that jutsu is abit hard if u ask me & i don't even think it would be as powerful as the last one.There are literally no attacks from Orochimaru that can feel him enough chakra to fuse with Samehada and use his full power.Here what ur overlooking is the fact that in every battle that Kisame showed an over powerd jutsu he sucked alot of chakra from others so there is no evidence to say that he can pull jutsu on that level with his own chakra pool.