The Canada international is joining in a free transfer from Lille. David is today in Turin for his medical.
Damiani told Tuttosport: "David needs depth, so it is essential that he is served well in spaces. Like (Randal) Kolo Muani, the Canadian can be both a first and second striker. Juve is full of young players, so they need a figure with personality and depth like Jonathan."
On Juve confirming coach Igor Tudor for next season, Damiani then added: "Tudor is the best purchase of the past season and will be able to enhance the Canadian. I put Juve on the podium for next season."
Finally, on Juve's new GM Damien Comolli, Damiani concluded: "I have known him for twenty years, he is very prepared, he has a great personality. Juve did well to bring him to Turin. I respect him as a man and as a director.
"He is a manager used to dealing with everyone: he works very well in a group, then when he has to make a decision he gets straight to the point."