Like i said, Kong Gun accomplished that, how do you know it is the least amount of power? The gap between G3 and G4 is huge, how do you know the amount of attack power needed is not in-between the two?
Until you understand this point, there is not much to talk about.
It is the same as people saying "it took A and B to take down C" because two guys beat one guy in a matter of minutes, assuming neither could have done it on their own.