If Walters is a permanent hooker then I say wing, but personally I would rather see Walters as back up for Brooks and Benji.
Edit, it’s also not easy to get a line on that with a few playing out of their preferred position. Doueihi is a FB, Walters is a 5/8, Thomo is a winger, Aloiai is a back rower . Imo.
However, if we could get Grant and move Walters to fire up the left while keeping Momirovski then I think the team would be much improved.