I wouldn't keep Kian Harrat or Joe Garner and I hope Mellon moves them on,so should create room for another 2 because Norwood won't be ready for the start of our season if he's had surgery.
The striker you mention that has just been at Swindon popped in 10 goals 36 games, so if we can squeeze 15 goals a season from him, that's not a bad return.