You look at our 17 for next year and I do actually think it'd compete well in Super League:

Jowitt
Johnstone
Scott
Pratt
Walmsley/Olpherts
Russell
Lino
Atoni
Hood
McMeeken
Storton
Pitts
Rodwell

Doyle
Uele
Vagana
Bain

But as a general rule a coach will have a squad of 30-34, essentially with a reserves team to pick from - as Wigan, Hull KR, Catalans all do. And our backup 'squad' at the moment looks like:

Booth
Walmsley/Olpherts
Law
Hall
?
Lawford
Shaw
Smith
?
Boothroyd
?
Kay

So there are obviously some gaps to fill. And if we recruit brilliant players then some of that starting squad will drop into the reserves. I'd personally like to see us recruit a world-beating second rower to fill that gap that Ashurst will leave. The fact I can say that is crazy considering where we were a year ago.

For what it's worth, I'd also sign up Pitts, Hood, and Griffin as transition players, as you say Trojan. But the ones we disagree on are Law, Shaw (I'd keep them and give them another year in development) and Croft. Think Croft's a perfectly adequate stand in at Championship level but centres are supposed to be a running threat and be able to jam people in defence. I don't think I've ever seen him do either, and he's had 5 years.

It'll take something special to be top 6 next year, we need to think more long-term. We need to keep improving off field activities to give us a chance to be in the play offs regularly rather than once in a blue moon. Next year 10th or above should be the target. Season after 8th, season after maybe 6th and so on.

Didn't Mills recently mention top 4?

To get anywhere near top half of SL next year, assuming we're in it, we need some Aussie type quality IMO,in at least 3 positions.Players such as French,Dufty and Moyland to take us to the next level.I am not talking about their positions, just using them as an example.
I think we need a hooker,half back and second row.

He didn't say top 4 next year. Just we were aiming fir top 4.

It was a 5 year plan to become a top 4 team.

I’m sure I read the target next year is to reach playoffs in SL.

I might have a cheeky bet on challenge cup next year. A lot of players this year really enjoyed that ocassion and I’m sure will likely want a return for the main event. Outside chancd but I’d like to see Trinity go far in the Challenge cup next season.