I would prefer Purple Haze Feedback and Jorge Joestar as they’re more original stories giving us new plots and characters. Over Heaven is mostly additional context for a variety of things in parts 1 and 3, which while nice is low in priority for me. Much of it would also be very boring to watch animated as the entirety of the novel is DIO’s personal monologues and musings with him occasionally describing new events unseen previously, but mostly him thinking to himself. I think it is something that inherently works far better as a novel than an animated work.