No need to tank the explosion, the Yata mirror could just reflect the TBB back. That the TBB doesn't explode after touching a target was proven various times, lastly when the Juubi's was bowling the numbers of Doton walls away from its way. There is no reason to call the spiritual weapons power into question, the databook explained their absolute effectiveness and if Totsuka, the counterpart of Yata, made an Edo Uzumaki who mastered the Rinnegan unable to any further act and dropped him into a completely hopeless state where he got sealed away in an eternal Genjutsu with a so called ultimate seal, we can await from the Yata similar powers in defensive means.