If Herbie could be convinced to stay at centre, and we could ship him out without paying any portion of his contract, I'd prefer we move Staggs on. That gives us Walsh at the back, Cobbo and Herbie in the centres, and Mam at six while we still have Reyno. It's hard to plan any further than that at this stage, but Walsh to the halves seems a fair option.
We have Niu lining up in the one this week. Martin, while he's been great, has recently shown some deficiencies at the back and is no guarantee to be here next year. Neither Farnworth or Cobbo are proven fullbacks. Regardless of the club's thoughts or plans before this, I think Walsh becoming an option is way too good of an opportunity to pass up, and you just make it work with the other pieces you have. The truth doesn't seem that hard to me.