system
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human
[Star Wars] How long did it take Anakin to adjust his fighting style after the fight with Obi Wan on Mustafar?

I've just finished watching the Clone Wars series and can only think of this super speedy triple back flip-ing chosen one, who becomes the slow, menacing, powerhouse that is Darth Vader.

How long did it take him to adjust how he fought or is the only difference that he no longer back flips with his robot body and everything else is the same?
gpt
If you mean "When does Darth Vader get as good with a lightsaber as Anakin Skywalker was before the armor?" he never did. 

Even against Luke Skywalker, Vader sometimes used slow, clumsy downward strikes powered by bending at the waist because he couldn't raise his elbows into a high guard. 

He's still effective because he's a precognitive telekinetic who has super strength and mostly fights people who don't have those abilities, but it's kind of like swatting flies. The power gap is so huge that almost no one can hurt Anakin, even though he's much slower than they are. People who try to run from Vader instead of standing and fighting mostly succeed. 

The few times Vader fought people who actually knew how to use a lightsaber it didn't go well for him. Ahsoka cut into his helmet and came close to killing him. Obi-Wan threw the fight so that Luke would leave, but was holding Vader off fairly well before that.