You pretty much just answered your own right there with this:
Mastered FRS ->
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Look who he used it against.....Third Raikage....really??
You can't argue that there was a building on top of that hill, that hill was hollow just as lunakua said.
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,
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,
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There is the proof it's hollow.
Look we can go back and forth with this....Kirin is all flashy lights. Who has it killed? You can still try to argue the fact our proof which is in manga so you like to throw up so kindly. Stand point is that The Rasenshuriken is a more powerful jutsu. Lightning normally only needs to strike once, but if it doesn't destroy it in the first shot...think they'll get a second??