My ideal backline has Cooper and Barnes both in it at 10 and 12. I think their skillsets compliment each other, whereas McCabe outside of Cooper during the world cup had a complete lack of chemistry. During the WC the clever teams rushed up on QC (Quade Cooper) completely shutting down his space and causing him to play low percentage moves, throw low risk/reward passes. Having another play-maker outside of him means that when he is stifled he can just shift it on one, especially since shutting him down means creating space for the next player along.
They compliment each other. Quade can set a backline alight and create something out of nothing, but if there really is nothing he will still try an even lower percentage move, where-as Barnes has the conservative nature to take field position when there is nothing on offer. Barnes offers a defensive kingpin to cover QC (Quade Cooper), but doesn't have anywhere near the attacking nous that QC (Quade Cooper) offers.
My ideal backline would be
9. Genia
10. QC (Quade Cooper)
11. Ioane
12. Barnes
13. This is the shitfight. Horne, McCabe, AAC (Adam Ashley-Cooper), JOC (James O'Connor)
14. Mitchell
15. Beale
My ideal backline assumes that QC (Quade Cooper) and Mitchell can return from injuries in the form they had last year. The number 13 shit-fight is a shit-fight everyone would love to have. JOC (James O'Connor) is so good he has to be in the starting lineup and on the field somewhere, although I would rate him below QC (Quade Cooper), Barnes, Beale and Lilo as a playmaker. AAC (Adam Ashley-Cooper) also is so good he should be starting in some position. McCabe adds balance to the backline. A backline that has a lot of creative playmakers needs a hard-hitting, hard tackling line breaker. And Horne, despite the outside-of-NSW haters, is our only specialist 13, and offers a similar skillset to McCabe. Not a creative genius, but in a backline of creative geniuses, he has the ability to run hard and tackle hard.