I think the Sharks & coach won't take it easy tomorrow given they lost their last game.
100% Sharks will bring their top game to Brookie if Penrith lose to Titans, as Sharks can finish 3rd with a win over Manly and escape going to Melbourne.
100% Sharks will bring their top game to Brookie if Dogs beat Cows. There's 60 points spread between Sharks and Dogs on for/against. A Dogs win and a Sharks loss that covers the 60 points puts Sharks into 5th. For example, a Dogs win by 10 and Manly win by 50 would put the Sharks into trouble.
If Cows beat Dogs, even with a loss to Manly, the Sharks will hold 4th place as the Cows-Sharks points spread is around 150 points.
So, if you're hoping the Sharks will vs Manly rest their players or take it a little easy, you'd be cheering for Cows to beat Dogs and then for Penrith to beat Titans.
BUT, if Cows do beat Dogs, and Manly lose to Sharks, then Manly will have to go to Townsville next week.
[If there are any draws then obviously ignore the above!]