public static int LokiPoe.InstanceInfo.Blight.EncounterStage { get; }
This is a number that go from 0 to 5 (from a first observation), and describe the actual Blight encounter State: 0 = No encounter, 1 = the encounter is running, 2 = The encounter success and some chest loot are still unopened, 3 = The encounter success , the pumb is been destroied, and some chest loot are still unopened, 4 = The encounter success and all chests are been open, 5 = The encounter failed.