I think the reason we have struggled with 4-2-3-1 is that we tried fitting in too many of Hysugems, Brockie, Iffil and Hernandez. That is just too many players who don't run with as much pace and energy. Cuuningham looked decent in the last game so I would try starting him again but keep Hicks and put Hysugems up front by himself. Brockie and Iffil both on the bench. I would still be tempted to start Reiera ahead of Lia but I don't like changing too many things at once so would stick with Lia who is at least playing better than at the start of the season.
edit: Not at all convinced by Fenton at RB so Muscat should play there IMO