Constant screeps::constants::STRONGHOLD_DECAY_TICKS

pub const STRONGHOLD_DECAY_TICKS: u32 = 75_000;

Average ticks until collapse for a stronghold.

Calculated lifetime includes a random 10% variation. Value is determined by the formula (source):

duration = Math.round(STRONGHOLD_DECAY_TICKS * (0.9 + Math.random() * 0.2))