2 points are always important. But if it's at the risk of injury we are better off playing it safe considering our podition on the ladder.
Assuming no injury concerns of the 4 players.
Peachey should easily backup. He will play 20 or 30 minutes you would think. Hardly a huge boost on his typical workload.
RCG I think could backup easily also. I doubt he gets 60 minutes in an Origin match. But even if he did we can just cut his minutes down for us. Give him 20 minutes and let Merrin, Tamou, JFH and Ellis split the 40 he misses. He and Peachey are safe bets.
Cleary should be loe risk too. He's young and in terrific shape, but most importantly he has not long returned from a long stint on the sidelines. He can do the 160 minutes without fear of burnout. Although it will also be his most intense and physical match ever. He might be too sore to backup.
Maloney? Not worth the risk at all IMO. We cant afford to throw much of an extra workload on him. He could probably do it just fine. But I would rather play it safe with him even if the other 3 couldnt backup. He's not as young or as fit as these other 3. He's the guy we need fit and firing in the finals. Finishing first is pointless if our guys are too busted to go on with it in the finals.