Mirth I can only answer for me, but when I think about resting them, like you said, the players that it's clear are not fully fit, like Saka or Odegaard and the ones that are injury prone, like Timber and Califiori. So yeah, I will always look to rest them, we lost the title last season, and in seasons before because of injuries, we are unlucky and have injury prone players, so I'm just scared lol. Think about it, we are in October and we only have Saka as a real right winger in the squad fit and Goykeres as the only striker. Just like to play it safe
The rest can play, I know what you mean about the harder games but we should be able to beat Olympiakos no questions asked.