If Oledzki is fit, I would be looking at resting 1-2 of Holroyd, Tetevano and McDonnell. Holroyd and Tetevano have played every week so resting one of them will likely be of benefit to them (Sangare and Lisone have both already missed matches).
Likewise McDonnell has never played so much consecutive SL rugby, so rest him for a week. I would then be looking to rotate if they stay fit to enable our players to stay fresh. Martin and Smith can have a week off in subsequent weeks: a luxury we have not had for quite some time.