I wish there would be a more elegant solution to just kill them all.
Like poisoning them and them villain-laugh while they croak pathetically.
It is, afterall, a hack n slash game, and in most cases, things must die. At any rate, you can poison the goblins in the central part of the Goblin Camp (there are videos on this) but poison those on the inner Selunes Temple, no or not that I have seen anyways.
You can do a playthrough where the Gobbos never actually attack Druids Grove cause you opted to not progress the story that far OR you could kill Minthara (because Minthara leads that attack, not Droz or Priestess Gut) and leave Droz and Priestess Gut alone given the goal is to prevent a Gobbo attack on Druid's Grove if you are on the Druids/Tiefling side and then just go off doing whatever you want in the Underdark, etc.
Just throwing ideas out there. Me, personally, other than Druid's Grove and the Myconid Colony, I kill everything, but hey, that just me and the game I play. heh
