I'd take Ball with the first pick, so if he's available at 2, of course Ball.
He seems to be the one guy destined to be a leader of a championship team. I concede that Fultz has more athletic skills, but the leadership qualities, the savvy, of Ball, is something that you need to compete for a championship. Does IT have that quality? Sort of, but more in the form of, "hey, it's the 4th quarter, climb on my back to a victory" , and not in a guy who just makes it fun for his teammates to play with him. He seems to have a Magic Johnson quality to him in his playing style. I just think we will regret not drafting him. Fultz is going to be a guy who will fill up the stat sheet, but just doesn't exude team leadership.