Hey, this is a late response, but if you want to give it another shot, I'll give you a hint! There's a specific item you need to use to beat the sorcerer, and it's not the potion.
yeah just trying everything everywhere doesn't seem to get me any items, maybe you could give me a hint that pertains to a section of the game? or better yet if you don't mind it you can just give me the answer as i don't mind it ruining the challenge of the game.
Sure! SPOILER WARNING for anyone reading this -
The item you need is the amulet you get by casting polygot at the shrine (go deeper into the mountain, past the ogre.) That will protect you from the sorcerer's attack, meaning you can sacrifice health during the rest of the game and keep enough mana to fight him.