Williams, Gavin Henson, Ryan Jones, James Hook, Mike Phillips, Alun Wyn Jones, Lee Byrne and new-signing Tommy Bowe are all on course for a call to the prestigious Lions tour to South Africa next summer.
The Ospreys backs were starting to click, though, and Andrew Bishop did a fair impression of more lauded team-mate Gavin Henson - rested for this match along with skipper Ryan Jones - with a sublime pop-pass.