Obviously a lot depends on Lions selection.
Here's how I see it:
Very likely: Itoje, M. Smith, Earl, IFW
Possible: Martin, Chessum, Underhill, T. Curry, J. Willis, CCS, Mitchell, Lawrence, Furbank, **Farrell**
Outside shot: Genge, George, Slade, Freeman, Marchant, Sleightholme
A good 6N could move any of the possibles/outside shots into real contention. Injuries will definitely play a part too.
So for the Argentina tour, there will likely be very good opportunities for Fin Smith and Tom Willis to start. A lock too, whoever that may be.
If Mitchell goes, I'd like to see Porter get a shot.