Hmm... Sandal Vavage has more experience, has slight healing powers, has enhanced strength, stamina, and speed, is immune to age, disease, and fatigue, and is even immortal..............nah Joker wins.
Savage has battle skills and years of experience. Bu Joker is an enemy that does not make sense. He is random. Batman who is very skilled and ha battle plans struggles. I feel like Joker would win from his randomness. But Vandal would still live, he just can't win and would give up.
Savage slaughterhouse,he's a JLA/JSA/GL/Flash villain.No way is Joker even gonna come close to touching him in the prep department,physically too it's a slaughter,his superhuman strength and healing factor is more than enough.