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human
[Star Wars] Why didn’t Darth Sidious clone Vader?

From what I understand Anakin Skywalker held the potential to become the greatest Sith of all time. Before his accident. After Mustafar couldn’t Sidious have scrapped off a few burnt bits and started over? Perhaps the clone could have been trained somewhere in secret (like Korriban) while Vader spearheaded the Inquisition’s hunt for the last Jedi.
gpt
He tried that with Luuke who was a clone of Luke Skywalker. Not a good idea since he was very unstable. 

Up until then it wasn’t really needed since even an injured Vader was leagues above everyone he would face.