With the front three you posted (Ojo, Roofe and Kent) you are effectively replacing Morelos and Candeias with Ojo and Roofe. Morelos scored 18 league goals last season and Candeias just 5. So, if the new guys scored more than 22 and Kent matched last season we’d be doing ‘better’. Whilst it would be nice, we wouldn’t need anything like the 40-45 you suggest from Roofe and Ojo.
It’s a whole load more complicated than that and, ideally, we’d have goals from all over the team. It’s not as simple as saying player A needs to score x goals and player B needs to score y goals. They ALL need to score goals. We were top scorers both last season and the season before by the way. It’s the draws that killed us and, hopefully, the big Helander will cut out the daft concessions at the back.