This is Vader in his canon only incarnation, in his prime. (Rebels).
Aryn Leneer is in her prime, and Asajj Ventress is as of Dark Disciple. She is equipped with her curved-hilted red lightsabers, and her yellow lightsaber as backup. (Legends feats can be used for Ventress as well).
Round 2: Aryn & Asajj get Savage Opress as backup.
Battle takes place in Donald Trump's biggest mansion. Who wins?
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk