NPC Spawn Issue: Goblin Captain in Runny Eye

[Yinn Yang]

Have camped this named mob for a while and while the Goblin King has spawned quite a few times (and other named mobs), the Goblin Captain does not seem to be spawning. Trying to complete Treant Fists.

I know the revamp is coming soon, at which point the fractured femur will drop off pickclaw bonemenders, and also know the quest has been completed on green. Any chance the spawn is broken? Or is the Goblin Captain just that rare?