2-3 are garbage possessions due to time of the half or field position. You'll piss away another couple due to penalty and turnover.
You'll also punt twice. That's 8 possessions where you have to score. Half TD, half FG. 4 of each is 40 points. Good offenses do this.
USC isn't anywhere near this. With a 3 year starter at QB and Harrell's high powered O, they should.