Not sure what working pairs you're referring to, but at least to start last game, Luke and Kovacevic were playing together. Obviously losing Siegs as early as we did forced Luke and Dillon to shoulder a crazy load afterwards and lead to pair rotation, but that has been the pairing we've deployed the past few games.
As
@SteveCangialosi123 pointed out yesterday, Pesce and Dougie played as a pair together in Carolina in the past. Results were pretty positive, but of course, that was some time ago. Still, it's good that there's familiarity there. I'd personally prefer putting the most senior guys in Pesce and Dougie in that position of one playing on their off side as opposed to Kovacevic or Nemec.