eastman
John Solomon (38)
9. White
10. JOC (James O'Connor)
11. Koro
12. To'omua
13. Petaia
14. Wright (or Daugunu)
15. Maddocks (but I'd pick DHP if he comes back in decent form for the Rebs)
That's a pretty solid backline.
I think at this stage this is probably the strongest/most pragmatic backline (balancing experience vs potential) that we can put on the field- which can be refined over the next few seasons.
JOC (James O'Connor) is still not a great 10; he lacks a long passing game and ability to really unlock the backline. In saying that he is still threatening when he takes the ball to the line and with his short-passing game, and probably more importantly, he competes. You can trust him to make his tackles, is still relatively robust in contact and rarely has a poor game.
Deegan to me looks like the next immediate successor but as others have said, he hasn't played enough rugby at this level to deserve selection.
I also don't think you can select both Koro and Daugunu as starting wings. They're both extremely threatening and strong defensively, however both have limitations in skillset and rugby nous. Pick one to start and complement with a Wright (or potentially Ramm).