Brian will know what to do.
But here are my two cents anyway:
* As good as Wagon is, I believe his stiffling defence is much more useful at lock, to try and shut down Barrett and keep it tight around the ruck.
* We COULD shift Burt into the centres and bring Matty Petersen to the left wing. But that would effectively weaken one spot to strengthen another.
* Another possible idea is to put McKinnon in the centres. But see above.
So bearing this in mind, I believe that Delaney may well play - we need a specialist centre, with specialist defense for the centres.
And from what I hear, Delaney is big, fast, strong and aggressive - the perfect foil to Mark Gasnier.