Alnwick should be back, assuming he is healthy/recovered/symptomless. But we are still wobbling away on the 'four first-team-defenders' tightrope.
I think if you polled all Saints supporters about the line-up now, the average response would roughly be 4-2-3-1, and, defence aside, we've got players who naturally fit in all those positions. So, no more players out of position. No more 3-5-2 or 4-3-3- or even 4-4-2. Durmus and McAllister aren't performing, so should be dropped. Straight shootout between Erwin and Obika to play up top; I'd go Erwin. Connolly, McGrath and MacPherson in behind. Ethan and Foley at the base of midfield.
See, this all feels fairly straightforward to me. I'm not sure why we seem to be making things so complicated for ourselves.