I reckon they should go with this.
1. Hayne - Clearly their best fullback option ATM.
2. B. Morris - top try scorer
3. J Morris. - Put him on the same side as his brother they did some really good things when at the drags together
4. Jennings - This guy will be an absolute gun center in a few years, dead rubber give him more experience
5. Monaghan - good in the air, their best option against Folau
6. Mullen - IMO a decent 5/8 and their best option.
7. Wallace - again their best option it is no good bringing in an older half in a dead rubber as they are unlikely to be their next year
8. Poore - decent young prop
9. Ennis - IMO deserves his chance after great form for the doggies
10. Bailey - if he is fit enough said as he is their best prop
11. Creagh - one of their best in origin 2
12. O'donnell - also had a good game 2 deserves his spot.
13. Tongue - a real origin player, similar to Dallas Johnson, will get through plenty of work and not let his state down
14. Clinton - his form this year warrants a spot on the bench
15. Wing - gave real spark when he came on in game 1
16. Waterhouse has been really under=rated this year been in great form
17. Kite - should go alright from the bench
unfortunately i couldn't find a spot for Gidley ... so, i would make Bailey captain of that team as he is not only their no.1 front rower but also a great leader.