Giles has looked very suspect defensively recently. Too easily shoved off balance. I think he has lost his early confidence.
Clarke, i'm not convinced he cuts the mustard defensively at this level either. He hasn't been given a fair crack of the whip but I think there is a reason for that.
Wiles has also looked suspect defensively but i don't think he's any worse then the other two there. We are wasting his talents though.
If Olusunde is back, I'd go with Harding left wing back, Olusunde right wing back. In the absence of Mattock, that's about the best we can do in my opinion.