[Theory] Three Levels of Tomoe

[Senju Bean]

Sharingan: 3 tomoe

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Juubi's Eye: 6 tomoe

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Madara/Kaguya/Shinju's Rinnegan: 9 tomoe

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Each one is ascending in power. Sharingan is clearly weaker than the eye that can cast IT. We haven't seen the Juubi eye's power, but I suspect it is greater than the Sharingan.

 

[HashiraMadara]

Don't say weaker we have no total info about it!

 

[Senju Bean]

Don't say weaker we have no total info about it!

IT is the most powerful jutsu shown. That is info enough.