Actually no from what I read someone submitted a Custom Jutsu which could create thunderclouds, and after it was approved they asked Scorps if they could use this to form Kirin instead of the B-Rank fire technique. He said nope as the B-rank fire technique was the only way to form Kirin.
than Scorps is wrong, from what i remember, you can use any Fire Jutsu that reaches Long-range and is B-rank or higher ranked (not Flame Crater for example of course)
Of cource I did, xd
Among others...
But yeah, it's the best one to use for multiple reasons that are prety obvius... 
Yeah he is ~__~
I agree. The whole point of Kiri is using your chakra to create a natural disturbance in the sky, which you then conduce with your lightning chakra, aka Chidori. That can only be achieved with a Fire Jutsu, so far as I'm aware. This could be done with a Wind or a Water jutsu that creates the same disturbance, or maybe a Heat Custom Jutsu, but never with an actual Lightning Jutsu, it defeats the whole purpose of guiding natural lightning.
I don't think that works actually.I have to agree with scaze on this.
The funny thing is that Kirin can be only casted if this particular fire jutsu is directed into the skies. To my knowledge, no other jutsu can be used to perform Kirin.
I don't agree. Not all Whoops are nukes. Sometimes are just well thought out uses of common jutsus, that were applied at just the right time. I saw this all the time with the person I consider the Sage of Whoop-Ass, and no, it's not Nero, obviously, it's Izuna Uchiha. He simply has the brains to look at your opponent's first jutsus and, in his first turn, find the exact counter that will leave the opponent unable to do anything. Those are the true Whoopings, because they take what's happening and bend it to their will.
