@Chris-B I wouldn't discount J Ioane from selection just because he hasn't played yet. In hindsight they should have brought him on in BA in a close test but I can understand why they didn't want to put him in that situation. Three 1st 5s were taken in 2015, with Slade filling that 1st 5/fullback role that DMac would of this year, and BB now does. In 2011, only 2 1st 5s were selected but we ended up using 4. Weepu did provide cover, as TJP might.
You can easily cover for a winger (e.g., ALB) so I wouldn't be selecting too many specialist wingers. I wouldn't be surprised if JB has been discussed by the coaches as a 1st 5 option for the lesser pool games if J Ioane isn't chosen.