5) After XXX time have the goblin attack the druid camp regardless OR have the Tieflings attack the goblins to attempt to get on the road. Being backed into a corner like the tieflings would cause them to do "something" rather than wait to die.
Please no timed quests!
+1
What you *could* do is a conditional advancement of the quest. For example, if you reach the Goblin camp, this might serve as a trigger that in the meantime, an attack on the grove occurs. If you get to act 2 without killing the bandit leaders, the druids grove might get wiped out.
But this would not be timed, but just advancing the quest at certain stages in the narration.