Wait is this about the hag's dungeon? Where you have to descend but your path is blocked by poison?
Pretty sure the jumps actually work. There seems to be a path your char will take that is somewhat poison free and allows you to jump from one platform to another. I should know, my whole party was made of STR 8 weaklings. You might get like 3 poison damage for some, that i couldn't avoid, but nothing that would kill you.
