Thanks for the reply. I believe it would depend on the odds of him spawning. I killed the NPCs for approximately 5 hours and never spawned him. That seems out of balance. If he has a 3% chance of spawning... then 45 sec. respawn for most of the npcs and 1 to 3 min for a couple of them doesn't seem out of bounds. Should on average take about as long as completing the first "real" step of any other epic I'd think.
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