Porecki is the most likely to chuck the ball accurately, the rest are more useful around the field
We need a functioning lineout above all, it is the cornerstone of leveraging penalties
Every other option needs to spend the summer getting better at that core skill, I remember the story of Hooper doing extras with Latu after each training
I actually think it is a lot about attitude and fitness. Like a batsman in cricket, they sprint and then have to be fit enough to drag that heart beat down and get the job done