My answer is:
□1. 11:30 pm / 00:00 am.
□2. and □3. I suggest three things below;

1. Seers and Psychics should NOT do COs today,
2. we should request Seer candidates to select the SINGLE same person today,
and 3. we all should do COs tomorrow, saying 'I'm not a Seer who knows X is a wolf' or 'I'm the Seer who knows X is a wolf.'

I think we should select a person who seems a villager better.
Of course, there may be a risk for selecting the Madman,
but it seems much more beneficial that we get a reliable villager and reduce candidates of the wolves among villagers.

□4. Fresh oil!
I'm not familiar with this village's arrangement, so that I'd be happy if you give me your opinions.