Evernight Isle runs on one mechanic: light versus darkness. Your Lighthouse, powered by four zombie-powered Generators and electricians, pushes back the night - it grants Virus Resistance and removes the debuffs that otherwise weaken you constantly. Unlike Season 2's Furnace, the penalty for ignoring this system is much harsher, and there's no catching up once you fall behind.
Assign clear Generator and electrician duties within your alliance from day one - rotate members through keeping the Lighthouse fueled rather than leaving it to whoever happens to notice it's low.
Blood Night Descends hits three times a day (roughly 02:30, 10:30, 18:30), making monsters stronger each time. Agree on a response plan as an alliance in advance - who reacts and when - rather than everyone scrambling independently each time it triggers.