How powerful is Naruto's BSM ransengan?

[Sennin of Logic]

those orbs are similar to jinton and not TBB (therefore they are not TBBs)

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You're clearly missing the point. 4 Juubi TBBs failed to do damage to 4 orbs. Therefore, for an attack to crack 1 orb would have to be stronger than a Juubi TBB. And since Naruto contributed to at least half of that attack, his BSM ransengan>1/2 juubi TBB.