Mercedes need to ensure Lewis and Bottas manage the pace and drive safely and only focus on Max. Let Perez do what he wants he doesnt have the pace to win.
Max can still win this race easily he has a very fast race car despite the minor setback.
As for the Brazil engine.. i does not have to be on the same tune as it was in Brazil. The team probably realized that they ddint need the max power here because of the nature of the circuit.. or its at max power but the setup is more dow force biased.
It will standout more in the final race where they can really gain a lot of time on the straights.
Merc must focus on good strategy here. No silly stuff and dont wait too long to change tyres like they keep on doing.