Isn’t Luke best feat by ROTJ beating Vader? Yoda has the entire clone wars series, lifting the X-Wing out of the swamp (which Luke didn’t do until TROS) beating Dooku, and overpowering Sidious.
I know many look to comic book feats and statements about speed for certain points of view, but look at four major lighsaber fights in the PT—QuI Gon and Obi Wan vs Maul, Obi vs Anakin, and Yoda vs Dooku, and Yoda vs Sidious, and tell me that ESB and ROTJ Vader vs Luke compare in the slightest.
They don’t. Period.
Yoda wins because there is nothing that suggests Luke can beat him in sabers, especially when you look at the ROTJ lightsaber fight.
Yoda take this mid to low difficulty. Not only does he have saber advantage, but he his much more knowledgeable in the force. While do give props for defeating Vader, he was conflicted and weakened because of it. Luke also got a massive rage amp. Yoda should take this unless he runs out of stamina.