Respawn Time: 2 days, 18 hours and 3 minutes
CH Chain:
FR: 65
Min Damage: 126
Max Damage: 420
CR: 110
Aggro Range: 70
Assist Range: 0
MR: 80
HP Regen: 10500
Mana Regen: 0
PR: 420
Combat HP Regen: 100
Combat Mana Regen: 0
DR: 420
Run Speed: 1.75
Attack Delay: 12
See Invis: Yes
See IVU: Yes
Sees Shroud of Stealth: No
Summon
Enrage
Flurry
Dual Wield
Magical Attack
Unslowable
Unmezzable
Uncharmable
Unstunable
Unsnarable
Unfearable
Immune to fleeing
Immune to melee except magical
Proximity Aggro
Always Calls for Help
Corpse Camper

In order to spawn Doomshade you’ll first need to kill 4x a Dark Master in the middle of the zone. After all 4 die shortly after you’ll see an emote:

Doomshade is on approx. 3 day respawn timer but the 4x a Dark Master spawn much more frequently (a few hours?). This means if Doomshade isn’t “up” then he won’t spawn even if you kill all the Masters.