Aston, Bentley, Campbell, Chamberlain, Chapelhow, Davies, Hallas, Keyes, Kirk, Macani, Magrin, Mendeika, Moore, Oledzki, Roche, Sironen, C. Smith, Thomas
With that 18 man squad I'd personally go with:
14. Oscar Thomas
19. Johnny Campbell
3. James Mendeika
20. James Bentley
40. Ed Chamberlain
41. Cory Aston
7. Joe Keyes
8. Liam Kirk
34. Scott Moore
15. Jon Magrin
11. Colton Roche
37. Cameron Smith
29. Sam Hallas
10. Damian Sironen
31. Mikolaj Oledzki
36. James Davies
37. Ted Chapelhow
However if Tonga gets clearence I'd go with:
Campbell
Macani
Tonga
Bentley
Chamberlain
I know Macani can be a liability but with experience like Tonga inside him it might help his game. Plus if he gets space he can motor but his inclusion would just be the by product of having more safety at the back in Campbell. I just think that Thomas isn't safe at the back and has cost us a few points.