The key is the forward pack you have to work off.
In Penriths case their missing link was Hooker.
When Segy was on fire they Pushed top teams in 13, finished top 4 in 14, Korisou provided enough cover in 15 but in 16 Segy went off the rails and Korisou left for Manly. They lacked that killer blow for the next 3 years, Wallace filled in amicably and managed to do a job but it just wasn’t enough.
All through though you have a look at the forward pack they had at their disposal.
They were able to provide enough for the young halves to play off the back of.