@phantomrant: what if I took away frags and just gave him clackers?
Well, he has plenty of other equipment to use to gimp Hei, but Ripple itself doesn't do much to people who don't have a natural weakness to sunlight. Even if channeled through oil-coated crackers, it shouldn't give Hei more than a mild burn. Course Joseph has more than enough physical strength to strangle Hei to death.
How fast is Joseph Joestar?
On foot, he's at least as fast as Hei even though Joseph may not have the same skill in agility. He's got superhuman running speed from how he could race alongside Pillar Men who can speedblitz normal humans. 'Course, Joseph has FTL reactions/burst speed, so Hei isn't getting within a few meters without getting blitzed.