Really tough decision.

Catalans is out biggest game in three years as I feel we have a real chance in the Cup this year.

To miss out on the top four play offs we'd need to lose five from twelve and that's assuming Saints or Wakefield win all of their final twelve games. On the other hand we need to aim for the top two to get a home play off game.

I think I'd go full strength against Cas and we may get the chance to rotate against Huddersfield.

Play Carlos at Centre?

Again tough choices at centre and wing.

FWIW I'd play Pryce at stand off, not sure about the backs though

Talanoa, Fonua, Yeaman, Michaels IMO.

I honestly don't know!.
Yeamans defense could be needed against a physical Catalans team, but Carlos needs to be in somewhere.
Could Pryce be used off the bench again?.

I would play Pryce at stand off then a straight choice between Yeaman and Carlos at left centre. Tuli and Micheals on the wing.

I'd play pryce against his former club and yeaman needs to be in the centres as his defence is better than carlos. Then a decision on whether to carry a back on the bench but personally I'd go with 4 forwards