Treant fist question goblin alchemists do not spawn

[wat3rbug]

I have camped for both of these goblins through several experience levels in Runnyeye. I have almost maxed my faction with the halfings from killing goblins in Misty Thicket trying to get that goblins to spawn. I have had others watch for these mobs to spawn. To date, the goblin alchemist in Misty Thicket and the goblin alchemist have never been sighted. They drop essential items for the Treant Fist quest.