How powerful was Dark Anakin?

Who is "Dark Anakin"?

Answer - hes the anakin after mace windu dies and before the lava of Mustafar incinerated him in flames.

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Acrobatic's.

1) He leaped across the Lava of planet Mustafar.

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[Ending]

Source: Page 250 from "Revenge Of The Sith"

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The 7 photo's about Anakin dueling Obi Wan.

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Answer - I personally don't believe he was more powerful than Dooku even here. Especially since this was his only fight.