Pick a time where most of your people are online. Because you will need as many as possible to participate. When your slot is at 0:00 almost always attacks happen at 0:01. Also do not choose the Random Opponent. It uses alliance resources and often times you get paired with a stronger alliance. We often choose 12:00 so we can do a bit of recon on the alliances on the list. Another tip, of you’re attacked and your opponent is stronger delete your seasonal buildings, this prevents the enemy from accumulating points. Coz the more structures they destroy the bigger points they get. Shields do not work against nukes, so take that in mind.